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ORIGINAL RESEARCH article

Front. Phys., 20 March 2024
Sec. Mathematical Physics

A comparative analytical investigation for some linear and nonlinear time-fractional partial differential equations in the framework of the Aboodh transformation

Saima Noor,
Saima Noor1,2*Wedad AlbalawiWedad Albalawi3Rasool ShahRasool Shah4Ahmad ShafeeAhmad Shafee5Sherif M. E. Ismaeel,Sherif M. E. Ismaeel6,7S. A. El-Tantawy,
S. A. El-Tantawy8,9*
  • 1Department of Basic Sciences, General Administration of Preparatory Year, King Faisal University, Al Ahsa, Saudi Arabia
  • 2Department of Mathematics and Statistics, College of Science, King Faisal University, Al Ahsa, Saudi Arabia
  • 3Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
  • 4Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
  • 5PAAET, College of Technological Studies, Laboratory Technology Department, Shuwaikh, Kuwait
  • 6Department of Physics, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
  • 7Department of Physics, Faculty of Science, Ain Shams University, Cairo, Egypt
  • 8Department of Physics, Faculty of Science, Port Said University, Port Said, Egypt
  • 9Research Center for Physics (RCP), Department of Physics, Faculty of Science and Arts, Al-Mikhwah, Al-Baha University, Al-Baha, Saudi Arabia

This article discusses two simple, complication-free, and effective methods for solving fractional-order linear and nonlinear partial differential equations analytically: the Aboodh residual power series method (ARPSM) and the Aboodh transform iteration method (ATIM). The Caputo operator is utilized to define fractional order derivatives. In these methods, the analytical approximations are derived in series form. We calculate the first terms of the series and then estimate the absolute error resulting from leaving out the remaining terms to ensure the accuracy of the derived approximations and determine the accuracy and efficiency of the suggested methods. The derived approximations are discussed numerically using some values for the relevant parameters to the subject of the study. Useful examples are thought to illustrate the practical application of current approaches. We also examine the fractional order results that converge to the integer order solutions to ensure the accuracy of the derived approximations. Many researchers, particularly those in plasma physics, are anticipated to gain from modeling evolution equations describing nonlinear events in plasma systems.

1 Introduction

Noninteger calculus is a prominent branch of mathematics that employs fractional order operators to mimic and clarify physical processes. Another facet of this topic is the application of noninteger order derivatives to both integration and differentiation difficulties. For zero-order the ordinary derivative is recovered. A fractional derivative has a noninteger order and meets specific conditions [1]. A few of the benefits of fractional derivatives include the memory effect and preserved demonstrative physical qualities. Using these operators, more recent and accurate research has been discovered. Thus, the theory and practice of fractional calculus are seeing a surge in popularity. The memory effect allows fractional order models to absorb all prior information, which improves their ability to anticipate and evaluate dynamical models. The efficient characteristics of fractional order calculus make it applicable to numerous fields, including biology and physics [26] economics and finance [7, 8], mechanical modeling and mathematical modeling, and [911] science and engineering. The singularity of the kernel in Caputo and Riemann derivatives presents a challenge for the authors. Given that the kernel is employed to elucidate the memory impact of the physical system, it is evident that this constraint prevents both derivatives from precisely interpreting the memory’s complete effect [1214]. In an endeavor to develop a novel fractional operator featuring an exponential kernel, Caputo and Fabrizio (CF) [15] proposed one in the mid-nineties. The nonsingular kernel of this derivative yields more rational results than the classical approach. A selection of CF operator applications is detailed in [1618].

There are two categories of partial differential equations: linear and nonlinear. Solving a fractional-order partial differential equation accurately is a difficult task. However, developing numerical and exact solutions to these equations is crucial in applied mathematics and theoretical physics [1921]. Consequently, innovative methods have been developed for analytical solutions that closely approximate the exact solutions [22, 23]. Differential equations were often solved using integral transforms. Integral transformations are helpful in solving initial value problems (IVPs) and boundary value problems (BVPs) in differential and integral equations. A wide range of authors investigated the effects of diverse types of integral transforms implemented on various categories of differential equations. The most frequently employed integral transform is the Laplace transform [24]. Watugala [25] introduced the Sumudu transform in 1998 as a powerful technique for solving differential equations and addressing engineering problems. T. Elzaki and S. Elzaki [26] introduced the “Elzaki Transform” as a new integral transform in 2011, which is extensively used in solving partial differential equations. Aboodh introduced the “Aboodh Transform” in 2013 and applied it to address partial differential equations (27). Numerous transformations are present in the literature.

In 2013, Omar Abu Arqub developed the RPSM [28]. The RPSM is a semi-analytical approach that combines Taylor’s series with the residual error function. Convergence series for nonlinear and linear DEs are both solved using it. In 2013, RPSM was first used to resolve fuzzy differential equations. To quickly get power series solutions for common DEs, Arqub et al. [29] created a novel RPSM method. Arqub et al. [30] developed a unique and appealing RPSM technique for fractional DEs issues. El-Ajou et al. [31] proposed a special iterative technique using RPSM to estimate fractional KdV-burger equations. Xu et al. [32] introduced a novel approach for solving Boussinesq DEs using fractional power series. Zhang et al. devised a robust numerical approach [33]. For further information on RPSM, see [3436].

Differential equations have been crucial in several aspects of applied mathematics and theoretical physics for an extended period, and their importance has increased with the advent of computers [37, 38]. Examining and analyzing differential equations used in applications reveal numerous intricate mathematical challenges, resulting in various methods for solving them. Various integral transforms, such as Laplace, Fourier, Mellin, Hankel, and Sumudu, were commonly used for solving differential equations. Khalid Aboodh introduced a new integral transform called the Aboodh transform and applied it to solve both ordinary and partial differential equations (39)(41).

The Aboodh residual power series method (ARPSM) [42, 43] and the Aboodh transform iteration method (ATIM) [3941] are regarded as the most straightforward methods to solve fractional differential equations. These approaches give numeric results for partial differential equations that do not need discretization or linearization and make the symbol elements of analytic solutions more visible and accessible. The fundamental goal of this research is to contrast and evaluate the efficacy of ARPSM and ATIM in solving linear and nonlinear PDE problems. It is worth noting that many linear and nonlinear fractional differential equations have been solved using these two approaches.

2 Elementary concepts

Definition 2.1. [44] The function ϕ(α, β) is assumed to be piecewise continuous and of exponential order.

For ϕ(α, β) and τ ≥ 0 Aboodh transform (AT) is given as:

Aϕα,β=Ψα,ξ=1ξ0ϕα,βeβξdβ,r1ξr2.

The Aboodh inverse transform (AIT) is described as:

A1Ψα,ξ=ϕα,β=12πiuiu+iΨα,βξeβξdβ

Where α=(α1,α2,,αp)R and pN

Lemma 2.1. [45, 46] Define two functions ϕ1(α, ϕ2β) that are piecewise continuous on [0, [ and of exponential order. Suppose that A[ϕ1(α, β)] = Ψ1(α, β), A[ϕ2(α, β)] = Ψ2(α, β) and λ1, λ2 are constants. Consequently, the following characteristics hold:

1. A [λ1ϕ1 (α, β) + λ2ϕ2 (α, β)] = λ1Ψ1 (α, ξ) + λ2Ψ2 (α, β),

2. A−1 [λ1Ψ1 (α, β) + λ2Ψ2 (α, β)] = λ1ϕ1 (α, ξ) + λ2ϕ2 (α, β),

3. A[Jβpϕ(α,β)]=Ψ(α,ξ)ξp,

4. A[Dβpϕ(α,β)]=ξpΨ(α,ξ)K=0r1ϕK(α,0)ξKp+2,r1<pr,rN.

Definition 2.2. [47] The fractional derivative of the function ϕ(α, β) is defined in terms of order p according to the Caputo.

Dβpϕα,β=Jβmpϕmα,β,r0,m1<pm,

where α=(α1,α2,,αp)Rp and m,pR,Jβmp is the R-L integral of ϕ(α, β).

Definition 2.3. [48] The following is the form of the power series representation.

r=0rαββ0rp=0ββ00+1ββ0p+2ββ02p+,

where α=(α1,α2,,αp)Rp and pN. This series is called multiple fractional power series (MFPS) about β0, where the series coefficients are r(α)′s and β is variable.

Lemma 2.2. Let us suppose that the exponential order function is ϕ(α, β). In such case, the AT is defined as A[ϕ(α, β)] = Ψ(α, ξ). Hence,

ADβrpϕα,β=ξrpΨα,ξj=0r1ξprj2Dβjpϕα,0,0<p1,(1)

where α=(α1,α2,,αp)Rp and pN and Dβrp=Dβp.Dβp..Dβp(rtimes)

Proof. Using induction, we can prove Eq. 2. Choosing r = 1 in Eq. 2 leads to the following results:

ADβ2pϕα,β=ξ2pΨα,ξξ2p2ϕα,0ξp2Dβpϕα,0

Lemma 2.1, part (4), states that Eq. 2 is true for r = 1. By substituting r = 2 into Eq. 2, we have

ADr2pϕα,β=ξ2pΨα,ξξ2p2ϕα,0ξp2Dβpϕα,0.(2)

Based on Eq. 2 L.H.S, we may deduce

L.H.S=ADβ2pϕα,β.(3)

One possible way to express Eq. 3 is as:

L.H.S=ADβpϕα,β.(4)

Suppose

zα,β=Dβpϕα,β.(5)

Equation 4 therefore becomes as

L.H.S=ADβpzα,β.(6)

Due to the utilization of the derivative of Caputo, Eq. 6 modified as.

L.H.S=AJ1pzα,β.(7)

Equation 7 contains the R-L integral for AT, which enables the following to be obtained:

L.H.S=Azα,βξ1p.(8)

Using the differential property of the AT, Eq. 8 is converted to the following form:

L.H.S=ξpZα,ξzα,0ξ2p,(9)

Eq. 5 gives us the following:

Zα,ξ=ξpΨα,ξϕα,0ξ2p,

where A [z (α, β)] = Z (α, ξ). Therefore, Eq. 9 is converted to

L.H.S=ξ2pΨα,ξϕα,0ξ22pDβpϕα,0ξ2p,(10)

when r = K. Eq. 10 is compatible with Eq. 2. Suppose that for r = K, Eq. 2 holds true. As a result, we may substitute r = K into Eq. 2:

ADβKpϕα,β=ξKpΨα,ξj=0K1ξpKj2DβjpDβjpϕα,0,0<p1.(11)

The next step is to illustrate Eq. 2 for the value of r = K + 1. Using Eq. 2, we can write

ADβK+1pϕα,β=ξK+1pΨα,ξj=0KξpK+1j2Dβjpϕα,0.(12)

When the LHS of Eq. 12 is taken into consideration, we get

L.H.S=ADβKpDβKp.(13)

Let

DβKp=gα,β.

By Eq. 13, we get

L.H.S=ADβpgα,β.(14)

Equation 14 is transformed into the following using the R-L integral and derivative of Caputo.

L.H.S=ξpADβKpϕα,βgα,0ξ2p.(15)

By ulatizing Eq. 11 and Eq. 15 becomes

L.H.S=ξrpΨα,ξj=0r1ξprj2Dβjpϕα,0,(16)

further, the following result is derived from Eq. 16.

L.H.S=ADβrpϕα,0.

Consequently, for r = K + 1, Eq. 2 is true. In light of this, we showed that Eq. 2 holds for every positive integer by applying the mathematical induction method.

A novel version of multiple fractional Taylor’s series (MFTS) is shown in the following lemma. This formula will be helpful for the ARPSM, which will be discussed further below.

Lemma 2.3. Let’s assume ϕ(α, β) be the exponential order function. The AT of ϕ(α, β), which is represented by the expression A[ϕ(α, β)] = Ψ(α, ξ), is characterized by a MFTS notation as:

Ψα,ξ=r=0rαξrp+2,ξ>0,(17)

where, α=(s1,α2,,αp)Rp,pN.

Proof. Let us analyze Taylor’s series expressed in fractional order as

ϕα,β=0α+1αβpΓp+1++2αβ2pΓ2p+1+.(18)

Applying the AT to Eq. 18 yields the subsequent equality:

Aϕα,β=A0α+A1αβpΓp+1+A1αβ2pΓ2p+1+

This is achieved by employing the properties of the AT.

Aϕα,β=0α1ξ2+1αΓp+1Γp+11ξp+2+2αΓ2p+1Γ2p+11ξ2p+2

As a result, 17, which is a novel variant of Taylor’s series in the AT, is acquired.

Lemma 2.4. Let A[ϕ(α, β)] = Ψ(α, ξ) be the MFPS stated in the new form of Taylor’s series 17. Then we have

0α=limξξ2Ψα,ξ=ϕα,0.(19)

Proof. From the Taylor’s series new form, the preceding is derived:

0α=ξ2Ψα,ξ1αξp2αξ2p(20)

After applying limξ to Eq. 19 and doing a short computation, we get the necessary result, which is shown by 20.

Theorem 2.5. Let the MFPS notation of the function A[ϕ(α, β)] = Ψ(α, ξ) is provided by

Ψα,ξ=0rαξrp+2,ξ>0,

where α=(α1,α2,,αp)Rp and pN. Then we have

rα=Drrpϕα,0,

where, Dβrp=Dβp.Dβp..Dβp(rtimes).

Proof. We have the Taylor’s series in its new form

1α=ξp+2Ψα,ξξp0α2αξp3αξ2p(21)

Using Eq. 21 and limξ, we get

1α=limξξp+2Ψα,ξξp0αlimξ2αξplimξ3αξ2p

Taking the linit, we arrive to the following equality:

1α=limξξp+2Ψα,ξξp0α.(22)

The application of Lemma 2.2 to Eq. 22 results in the following:

1α=limξξ2ADβpϕα,βξ.(23)

Moreover, by using Lemma 2.3 to Eq. 23, it is transformed into

1α=Dβpϕα,0.

Once more, by taking into account the new form of Taylor’s series and taking limit ξ, we conclude that

2α=ξ2p+2Ψα,ξξ2p0αξp1α3αξp

As a result of Lemma 2.3, we get

2α=limξξ2ξ2pΨα,ξξ2p20αξp21α.(24)

Using Lemmas 2.2 and 2.4, Eq. 24 becomes

2α=Dβ2pϕα,0.

Applying the same process to the new Taylor’s series yields the following results:

3α=limξξ2ADβ2pϕα,pξ.

Following the use of Lemma 2.4, the final equation is found.

3α=Dβ3pϕα,0.

In general

rα=Dβrpϕα,0.

Thus, the proof concludes.

The subsequent theorem details and establishes the conditions that govern the convergence of the new form of Taylor’s series.

Theorem 2.6. The expression A[ϕ(α, β)] = Ψ(α, ξ) represents the new form of the formula for multiple fractional Taylor’s, which is presented in Lemma 2.3. If |ξaA[Dβ(K+1)pϕ(α,β)]|T, on 0 < ξs with 0 < p ≤ 1, then the following inequality is satisfied by the residual RK(α, ξ) of the new version of MFTS:

|RKα,ξ|TξK=1p+2,0<ξs.

Proof. Let A[Dβrpϕ(α,β)](ξ) for r = 0, 1, 2, … , K + 1, is defined on 0 < ξs. Assume, as given, that |ξ2A[DβK+1ϕ(α,tau)]|T,on0<ξs. Determine the following relationship based on the revised version of Taylor’s series:

RKα,ξ=Ψα,ξr=0Krαξrp+2.(25)

Equation 25 is transformed by using Theorem 2.5.

RKα,ξ=Ψα,ξr=0KDβrpϕα,0ξrp+2.(26)

On both sides of Eq. 26, multiply ξ(K+1)a+2.

ξK+1p+2RKα,ξ=ξ2ξK+1pΨα,ξr=0KξK+1rp2Dβrpϕα,0.(27)

Lemma 2.2 applied to Eq. 27 gives

ξK+1p+2RKα,ξ=ξ2ADβK+1pϕα,β.(28)

Taking absolute of Eq. 28, we obtain

|ξK+1p+2RKα,ξ|=|ξ2ADβK+1pϕα,β|.(29)

After applying the specified condition in Eq. 29, we arrive to the following result.

TξK+1p+2RKα,ξTξK+1p+2.(30)

Equation 30 provides the necessary outcome.

|RKα,ξ|TξK+1p+2.

In consequence, the new condition for series convergence is developed.

3 A roadmap outlining the suggested techniques

3.1 Time-fractional PDEs solution using the ARPSM method

We describe the ARPSM set used to solve our general model.

Step 1: Simplify the general equation, we have

Dβqpϕα,β+ϑαNϕζα,ϕ=0,(31)

Step 2: The AT is applied to both sides of Eq. (31) in order to get

ADβqpϕα,β+ϑαNϕζα,ϕ=0,(32)

Equation 32 is transformed into by using Lemma 2.2.

Ψα,s=j=0q1Dβjϕα,0sqp+2ϑαYssqp+Fα,ssqp,(33)

where, A [ζ(α, ϕ)] = F (α, s), A [N(ϕ)] = Y(s).

Step 3: Take into account the form that the solution of Eq. 33 takes:

Ψα,s=r=0rαsrp+2,s>0,

Step 4: To proceed, follow these steps:

0α=limss2Ψα,s=ϕα,0,

and the following is obtained by using Theorem 2.6.

1α=Dβpϕα,0,
2α=Dβ2pϕα,0,
wα=Dβwpϕα,0,

Step 5: Find the Ψ(α, s) series that has been Kth truncated as follows:

ΨKα,s=r=0Krαsrp+2,s>0,
ΨKα,s=0αs2+1αsp+2++wαswp+2+r=w+1Krαsrp+2,

Step 6: Take into account the Aboodh residual function (ARF) from Eq. 33 and the Kth-truncated ARF independently, in order to get

AResα,s=Ψα,sj=0q1Dβjϕα,0sjp+2+ϑαYssjpFα,ssjp,

and

AResKα,s=ΨKα,sj=0q1Dβjϕα,0sjp+2+ϑαYssjpFα,ssjp.(34)

Step 7: Put ΨK (α, s) into Eq. 34 instead of its expansion form.

AResKα,s=0αs2+1αsp+2++wαswp+2+r=w+1Krαsrp+2j=0q1Dβjϕα,0sjp+2+ϑαYssjpFα,ssjp.(35)

Step 8: Eq. 35 requires multiplication by sKp+2 on both sides.

sKp+2AResKα,s=sKp+20αs2+1αsp+2++wαswp+2+r=w+1Krαsrp+2j=0q1Dβjϕα,0sjp+2+ϑαYssjpFα,ssjp.(36)

Step 9: Evaluating Eq. 36 by taking lims.

limssKp+2AResKα,s=limssKp+20αs2+1αsp+2++wαswp+2+r=w+1Krαsrp+2j=0q1Dβjϕα,0sjp+2+ϑαYssjpFα,ssjp.

Step 10: Find the value of K(α) by solving the given equation.

limssKp+2AResKα,s=0,

where K = w + 1, w + 2, ⋯.

Step 11: To get the K-approximate solution of Eq. 33, substitute the values of K(α) with a K-truncated series of Ψ(α, s).

Step 12: Solve ΨK (α, s) using the AIT to get the K-approximate solution ϕK (α, β).

3.1.1 Anatomy Problem 1 using ARPSM

Consider the following time-fractional Burger’s equation:

Dβpϕα,β2ϕα,ββ2ϕα,β=0, where 0<p1(37)

having the following IC’s:

ϕα,0=cosπα.(38)

and exact solution

ϕα,β=eπ21βcosπα.(39)

Using Eq. 38 and applying AT to Eq. 37, we get

ϕα,scosπαs21sp2ϕα,ββ21spϕα,β=0,(40)

Consequently, the term series kth-truncated are

ϕαs=cosπαs2+r=1kfrα,ssrp+1,r=1,2,3,4(41)

Aboodh residual functions (ARFs) are

AβResα,s=ϕα,scosπαs21sp2ϕα,ββ21spϕα,β=0,(42)

and the kth-LRFs as:

AβReskα,s=ϕkα,scosπαs21sp2ϕkα,ββ21spϕkα,β=0,(43)

To find fr (α, s) now r = 1, 2, 3, …. We multiply the resultant equation by srp+1, replace the rth-truncated series Eq. 41 into the rth-ARF Eq. 43, and solve the relation lims(srp+1) iteratively. r = 1, 2, 3, ⋯, and AβResϕ,r (α, s)) = 0. Here are the first few of terms:

f1α,s=π21cosπα,(44)
f2α,s=π212cosπα,(45)
f3α,s=π213cosπα,(46)

and so on.

Inserting the values of fr (α, s), r = 1, 2, 3, … , in Eq. 41, we get

ϕα,s=π213cosπxs3p+1+π212cosπxs2p+1π21cosπxsp+1+cosπxs2+.(47)

Applying the AIT to Eq. 47 yields

ϕα,β=cosπαπ21βpΓp+1+π212β2p1Γ2p+1π21βpΓ3p+1+1+(48)

The approximation (48) using ARPSM for the problem (37) is numerically analyzed as illustrated in Figure 1. This figure demonstrates the impact of the fractional parameter of the profile of the periodic wave solution (48). It can be seen from this figure that the fractional parameter strongly affects the profile of these waves; the wave amplitude decreases with increasing it. We estimated the absolute error compared to the exact solution (39) for the integer case, as shown in Table 1. It is clear from the comparison results that the error is minimal, and this enhances the high accuracy and stability of the inferred approximations.

Figure 1
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Figure 1. The approximation (48) using ARPSM for the problem (37) is numerically analyzed against the fractional parameter p for β =0.01: (A) p =0.4, (B) p =0.6, (C) p =0.8, and (D) p =1.

Table 1
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Table 1. ARPSM solution of problem 1 for different values of fractional order p for β = 0.01.

3.1.2 Anatomy Problem 2 using ARPSM

Consider the following time-fractional KdV equation:

Dβpϕα,β+ϕα,βϕα,βα3ϕα,βα3=0, where 0<p1(49)

having the following IC’s:

ϕα,0=2α.(50)

and exact solution

ϕα,β=2α2β+1.(51)

Equation 50 is used in conjunction with AT applied to Eq. 49 to get:

ϕα,s2αs2+1spAβAβ1ϕα,β×Aβ1ϕα,βα1sp3ϕα,βα3=0,(52)

Accordingly, the terms of the series that have been kth truncated are

ϕα,s=2αs2+r=1kfrα,ssrp+1,r=1,2,3,4.(53)

Aboodh residual functions (ARFs) are

AβResα,s=ϕα,s2αs2+1spAβAβ1ϕα,β×Aβ1ϕα,βα1sp3ϕα,βα3=0,(54)

and the kth-LRFs as:

AβReskα,η,s=ϕkα,s2αs2+1spAβAβ1ϕkα,β×Aβ1ϕkα,βα1sp3ϕkα,βα3=0,(55)

To find fr (α, s) now r = 1, 2, 3, …. We multiply the resultant equation by srp+1, replace the rth-truncated series Eq. 53 into the rth-ARF Eq. 55, and solve the relation lims(srp+1) iteratively. r = 1, 2, 3, ⋯, and AβResϕ,r (α, s)) = 0. Here are the first few of terms:

f1α,η,s=4α,(56)
f2α,η,s=16α,(57)
f3α,η,s=16αΓ2p+1Γp+1264α,(58)

and so on.

Equation 53 is used to get the values of fr (α, s) for r = 1, 2, 3, … ,.

ϕα,s=4αsp+1+16αs2p+1+16αΓ2p+1Γp+1264αs3p+1+2αs2+.(59)

When we use Aboodh’s inverse transform, we get

ϕα,β=16αβ2pΓ2p+164αβ3pΓ3p+116αβ3pΓ2p+1Γp+12Γ3p+14αβpΓp+1+2α+.(60)

For the problem (49), the approximation (60) using ARPSM is compared with the exact solution (51) for the integer case, i.e., for p = 1 as illustrated in Figure 2. It can be seen from this figure how consistent the two solutions are with each other, which confirms the accuracy of the approximate solution (60). The approximation (60) is numerically examined against the fractional parameter p as shown in Figure 3. It is observed that the fractional parameter p strongly affects the profile of these waves; the wave amplitude decays with growing pit. Moreover, we estimated the absolute error compared to the exact solution for the integer case, as seen in Table 2. One can see from the comparison results that the error is minimal, and this enhances the high accuracy and stability of the inferred approximations.

Figure 2
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Figure 2. This figure shows: (A) approximate solution (60) via ARPSM at p =1 (B) the exact solution (51) of problem 2 for β =0.01.

Figure 3
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Figure 3. The approximation (60) using ARPSM for the problem (49) is numerically analyzed against the fractional parameter p for β =0.01: (A) p =0.3, (B) p =0.5, (C) p =0.7, and (D) p =1.

Table 2
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Table 2. ARPSM solution of problem 2 for different values of fractional order p for β = 0.01.

3.2 An overview of the aboodh iterative transform technique

Consider the general PDE of space-time fractional order.

Dβpϕα,β=Φϕα,β,Dαβϕα,β,Dα2βϕα,β,Dα3βϕα,β,0<p,β1,(61)

Having the following IC’s.

ϕkα,0=hk,k=0,1,2,,m1,(62)

Determine the unknown function denoted as ϕ(α, β), while Φϕ(α,β),Dαβϕ(α,β),Dα2βϕ(α,β),Dα3βϕ(α,β) may be a nonlinear operator or linear of ϕ(α,β),Dαβϕ(α,β),Dα2βϕ(α,β) andDα3βϕ(α,β). Using the AT on both sides of Eq. (61), gives the following equation; for convenience, we represent ϕ(α, β) with ϕ.

Aϕα,β=1spk=0m1ϕkα,0s2p+k+AΦϕα,β,Dαβϕα,β,Dα2βϕα,β,Dα3βϕα,β,(63)

Solving this problem using the AIT yields:

ϕα,β=A11spk=0m1ϕkα,0s2p+k+AΦϕα,β,Dαβϕα,β,Dα2βϕα,β,Dα3βϕα,β.(64)

The solution obtained through the iterative Aboodh transform method is denoted by an infinite series.

ϕα,β=i=0ϕi.(65)

Since Φϕ,Dαβϕ,Dα2βϕ,Dα3βϕ is either a nonlinear or linear operator which can be decomposed as follows:

Φϕ,Dαβϕ,Dα2βϕ,Dα3βϕ=Φϕ0,Dαβϕ0,Dα2βϕ0,Dα3βϕ0+i=0(Φk=0iϕk,Dαβϕk,Dα2βϕk,Dα3βϕkΦk=1i1ϕk,Dαβϕk,Dα2βϕk,Dα3βϕk).(66)

By substituting Eqs 65, 66 into Eq. 64, the subsequent equation is obtained.

i=0ϕiα,β=A11spk=0m1ϕkα,0s2p+k+AΦϕ0,Dαβϕ0,Dα2βϕ0,Dα3βϕ0+A11spAi=0Φk=0iϕk,Dαβϕk,Dα2βϕk,Dα3βϕkA11spAΦk=1i1ϕk,Dαβϕk,Dα2βϕk,Dα3βϕk(67)
ϕ0α,β=A11spk=0m1ϕkα,0s2p+k,ϕ1α,β=A11spAΦϕ0,Dαβϕ0,Dα2βϕ0,Dα3βϕ0,ϕm+1α,β=A11spAi=0Φk=0iϕk,Dαβϕk,Dα2βϕk,Dα3βϕkA11spAΦk=1i1ϕk,Dαβϕk,Dα2βϕk,Dα3βϕk,m=1,2,.(68)

Eq. 61 may be expressed as follows, which gives the m-term analytically approximate solution:

ϕα,β=i=0m1ϕi.(69)

3.2.1 Anatomy problem 1 using ATIM

Consider the following time-fractional Burger’s equation:

Dβpϕα,β=2ϕα,ββ2+ϕα,β, where 0<p1(70)

having the following IC’s:

ϕα,0=cosπα,(71)

and exact solution

ϕα,β=eπ21βcosπα.(72)

By applying the AT on each side of Eq. 70, we arrive at the following result:

ADβpϕα,β=1spk=0m1ϕkα,η,0s2p+k+A2ϕα,ββ2+ϕα,β,(73)

When we apply the AIT to both sides of Eq. 73, we get:

ϕα,β=A11spk=0m1ϕkα,η,0s2p+k+A2ϕα,ββ2+ϕα,β.(74)

The equation that we get by iteratively applying the AT is given as:

ϕ0α,β=A11spk=0m1ϕkα,η,0s2p+k=A1ϕα,η,0s2=cosπα,

By substituting the RL integral into Eq. 70, we obtained the equivalent form.

ϕα,β=cosπαA2ϕα,ββ2+ϕα,β.(75)

Here are a few terms that are obtained using the ATIM procedure:

ϕ0α,β=cosπα,ϕ1α,β=π21βpcosπαΓp+1,ϕ2α,β=π212β2pcosπαΓ2p+1,ϕ3α,β=π213β3pcosπαΓ3p+1,(76)

The ultimate ATIM solution is given as:

ϕα,β=ϕ0α,β+ϕ1α,β+ϕ2α,β+ϕ3α,β+.(77)
ϕα,β=π212β2pcosπαΓ2p+1π213β3pcosπαΓ3p+1π21βpcosπαΓp+1+cosπα+.(78)

The approximation (78) using ATIM for the problem (70) is numerically investigated as demonstrated in Figure 4. It is shown that the fractional parameter p has a strong affect on the profile solution. Moreover, we estimated the absolute error compared to the exact solution (72) for the integer case, as shown in Table 3. It is observed from the comparison results that the error is minimal, and this enhances the high accuracy and stability of the inferred approximations.

Figure 4
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Figure 4. The approximation (78) using ATIM for the problem (70) is numerically analyzed against the fractional parameter p for β =0.01: (A) p =0.3, (B) p =0.5, (C) p =0.7, and (D) p =1.

Table 3
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Table 3. ATIM solution of problem 1 for different values of fractional order p for β = 0.01.

3.2.2 Anatomy problem 2 using ATIM

Consider the following time-fractional KdV equation:

Dβpϕα,β=ϕα,βϕα,βα+3ϕα,βα3, where 0<p1(79)

having the following IC’s:

ϕα,0=2α,(80)

and the exact solution

ϕα,β=2α2β+1.(81)

After executing the AT on each side of Eq. 79, we obtain:

ADβpϕα,β=1spk=0m1ϕkα,η,0s2p+k+Aϕα,βϕα,βα+3ϕα,βα3,(82)

Equation that results from applying the AIT to Eq. 82 is:

ϕα,η,β=A11spk=0m1ϕkα,η,0s2p+k+Aϕα,βϕα,βα+3ϕα,βα3.(83)

This equation is obtained by using the iterative process of the AT:

ϕ0α,η,β=A11spk=0m1ϕkα,0s2p+k=A1ϕα,0s2=2α,

Equation 49 yields the equivalent form when the RL integral is applied.

ϕα,β=2αAϕα,βϕα,βα+3ϕα,βα3.(84)

We get these terms from the ATIM procedure.

ϕ0α,β=2α,ϕ1α,β=4αβpΓp+1,ϕ2α,β=16αβ2p1Γ2p+14pβpΓp+12πΓp+1Γ3p+1,ϕ3αβ=128αβ4pπΓ3p+12Γ5p+1(ΓpΓp+1Γ3p+12βpΓ2pΓ2p+1)8βpΓ4p4pβ2pΓp+12Γ2p+12Γ4p+12πβpΓp+1Γ2p+1Γ3p+1Γ4p+1+16pΓp+13Γ2p+12Γ3p+12/πΓpΓp+12Γ2p+1Γ3p+12Γ4p+1Γ5p+1,(85)

The ultimate result of the ATIM algorithm is given as:

ϕα,β=ϕ0α,β+ϕ1α,β+ϕ2α,β+ϕ3α,β+(86)
ϕα,β=2α4αβpΓp+1+16αβ2p1Γ2p+14pβpΓp+12πΓp+1Γ3p+1+128αβ4pπΓ3p+12Γ5p+1ΓpΓp+1Γ3p+12βpΓ2pΓ2p+18βpΓ4p4pβ2pΓp+12Γ2p+12Γ4p+12πβpΓp+1Γ×2p+1Γ3p+1Γ4p+1+16pΓp+13Γ2p+12Γ3p+12/πΓpΓp+12Γ2p+1Γ3p+12Γ4p+1Γ5p+1.(87)

The approximation (87) using ATIM for the problem (79) is compared with the exact solution (81) for the integer case, i.e., for p = 1 as demonstrated in Figure 5. The obtained results demonstrate a good matching between the two solutions, which confirms the accuracy of the approximate solution (87). Additionally, the approximation (87) is numerically examined against the fractional parameter p, as shown in Figure 6. It is found that the fractional parameter p has a substantial impact on the wave profile. Moreover, we estimated the absolute error compared to the exact solution for the integer case, as seen in Table 4. One can see from the comparison results that the error is minimal, and this enhances the high accuracy and stability of the inferred approximations. Furthermore, we made a numerical comparison between the approximate solutions deduced using ATIM and APRSM, for example, 1 and 2, as shown in Tables 5 and Table 6. It is clear from the comparison results that the approximate solutions are more accurate. Also, it is observed that ATIM is more accurate than APRSM. However, in general, both approaches are characterized by high accuracy and stability throughout the field of study.

Figure 5
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Figure 5. Here, we considered the comparison between (A) the approximate solution (87) via ATIM and (B) exact solution (81) of problem 2 for β =0.01.

Figure 6
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Figure 6. The approximation (87) using ATIM for the problem (79) is numerically analyzed against the fractional parameter p for β =0.01.

Table 4
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Table 4. ATIM solution of problem 2 for different values of fractional order p for β = 0.01.

Table 5
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Table 5. An analysis of the absolute error between the ATIM and APRSM, for example, 1 at β = 0.01.

Table 6
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Table 6. An analysis of the absolute error between the ATIM and APRSM, for example, 2 at β = 0.01.

4 Conclusion

This paper has thoroughly examined the dynamics of fractional linear and nonlinear partial differential equations using advanced mathematical methods for solving them. The Aboodh Residual Power Series Method (ARPSM) and the Aboodh Transform Iteration Method (ATIM) are particularly effective in solving difficult equations accurately and insightfully. Including the Caputo operator, a key component of fractional calculus, has improved the accuracy and usefulness of the suggested techniques. This research has substantially contributed to the knowledge of fractional calculus applications in mathematical physics by comprehensively analyzing linear and nonlinear scenarios. These methods were applied to solve different examples of fractional differential equations, and some approximate solutions were derived and analyzed numerically to verify their accuracy and stability throughout the study domain. Moreover, the absolute error of these approximations compared to the exact solutions for the integer case was also estimated. The numerical results have proven the high accuracy and stability of the deduced approximations, which enhances the ability and efficiency of the used methods. The proven effectiveness of the ARPSM and ATIM indicates their ability to solve many issues across different scientific fields. This study enhances the approaches for solving fractional partial differential equations and paves the way for further inquiry and application in scientific and technical fields.

4.1 Future work

These methods are suitable for modeling many evolution equations in their fractional form that govern many nonlinear phenomena in different plasma systems. For example, these methods can analyze the KdV family [4954] and the family of Kawahara-type equations (55)(59), which describes solitary and periodic waves propagating with phase speed in a plasma. Moreover, these methods can be applied to analyze the family of nonlinear Schrödinger-type equations in their fractional form, which governs the propagation of nonlinear waves at group speed in a plasma [6065].

Data availability statement

The original contributions presented in the study are included in the article/supplementary material, further inquiries can be directed to the corresponding authors.

Author contributions

SN: Funding acquisition, Investigation, Supervision, Writing–review and editing. WA: Data curation, Formal Analysis, Investigation, Visualization, Writing–review and editing. RS: Investigation, Methodology, Resources, Validation, Supervision, Writing–review and editing. AS: Software, Validation, Visualization, Writing–review and editing. SI: Investigation, Methodology, Project administration, Visualization, Writing–review and editing. SE-T: Formal Analysis, Investigation, Methodology, Resources, Software, Supervision, Validation, Writing–review and editing.

Funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. The authors express their gratitude to Princess Nourah bint Abdulrahman University Researchers Supporting Project Number(PNURSP2024R157), Princess Nourah bint AbdulrahmanUniversity, Riyadh, Saudi Arabia. This work was supported by the Deanship of Scientific Research, Vice Presidency for Graduate Studies and Scientific Research, King Faisal University, Saudi Arabia (Grant No. 5903).

Acknowledgments

The authors express their gratitude to Princess Nourah bintAbdulrahman University Researchers Supporting Project Number(PNURSP2024R157), Princess Nourah bint AbdulrahmanUniversity, Riyadh, Saudi Arabia. This work was supported by the Deanship of Scientific Research, Vice Presidency for Graduate Studies and Scientific Research, King Faisal University, Saudi Arabia (Grant No. 5903).

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

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Keywords: linear and nonlinear partial differential equations, Aboodh residual power series method, Aboodh transform iteration method, caputo operator, Transformation by Fractional Burger’s equation, Fractional KdV equation

Citation: Noor S, Albalawi W, Shah R, Shafee A, Ismaeel SME and El-Tantawy SA (2024) A comparative analytical investigation for some linear and nonlinear time-fractional partial differential equations in the framework of the Aboodh transformation. Front. Phys. 12:1374049. doi: 10.3389/fphy.2024.1374049

Received: 21 January 2024; Accepted: 23 February 2024;
Published: 20 March 2024.

Edited by:

Yusuf Pandir, Bozok University, Türkiye

Reviewed by:

Ahmad Qazza, Zarqa University, Jordan
KangLe Wang, Henan Polytechnic University, China

Copyright © 2024 Noor, Albalawi, Shah, Shafee, Ismaeel and El-Tantawy. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Saima Noor, c25vb3JAa2Z1LmVkdS5zYQ==; S. A. El-Tantawy, dGFudGF3eUBzY2kucHN1LmVkdS5lZw==

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