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ORIGINAL RESEARCH article

Front. Phys., 30 January 2023
Sec. Fluid Dynamics

The MHD graphene−CMC−water nanofluid past a stretchable wall with Joule heating and velocity slip impact: Coolant application

I. Rashid
I. Rashid1*T. ZubairT. Zubair2M. I. Asjad
M. I. Asjad3*S. IrshadS. Irshad4S. M. EldinS. M. Eldin5
  • 1Department of Engineering and Computer Science, National University of Modern Languages, Islamabad, Pakistan
  • 2School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, NT, Australia
  • 3Department of Mathematics, University of Management and Technology Lahore, Rawalpindi, Pakistan
  • 4Department of Mathematics, National University of Modern Languages, Rawalpindi, Pakistan
  • 5Center of Research, Faculty of Engineering, Future University in Egypt, New Cairo, Egypt

The heat transport mechanism has an engrossing application in effective heat management for the automobile industry and the biomedical industry. The analysis of the MHD graphene−carboxymethyl cellulose (CMC) solution−water nanofluid past a stretchable wall with Joule heating and velocity slip impact is performed in this regard. A graphene-based nanofluid is considered. The dynamic model is used to simplify the complicated ordinary differential equations into non-dimensional forms, which are then evaluated analytically. Numerical data and graphs are produced to analyze the consequences of a physical entity with the aid of Maple 17. Moreover, the velocity field is decreased, while the magnitude of the magnetic parameter is increased. A decrease in θ(η) is observed as a result of an increase in ϕ. It is noted that a rise in the magnetic parameter causes a fall in the temperature distribution. It is perceived that −f′′(0) is decreased with an augmentation in βs, and an opposite trend is shown for ϕ. The velocity profile is the growing function of Mgn, βs, and Kve, with the reversed mode shown in case of ϕ. The temperature profile is the declining function of Pr, Ecrt, ϕ, and χ, with a contradictory trend observed for Mgn and βs. The flow regime is displayed against the viscoelastic parameter.

1 Introduction

In recent times, numerous fascinating energy applications have made use of nanotechnology to provide more effective and eco-friendly products and services. Moreover, one crucial aspect that is necessary to bring down the cost of maintenance or installation is the effective heat transport distribution across a power network. The optimal transmission of thermal qualities, such as density, specific heat, viscosity, and thermal conductivity, is essential for the optimum thermal efficiency. In this context, we consider the graphene nanoparticles to improve the thermal characteristics of the host fluid (CMC−water). In order to increase the rate of heat exchange, the flow patterns of nanofluids across thermal energy technologies are crucial. Several nanofluids have very engrossing applications in several fields, such as electronics cooling, automotive engine cooling, heat exchangers, boiling heat transport, solar collectors, medicine, and nuclear system cooling [1]. For the first time, [2] introduced the idea of nanofluids and empirically supported his concept. Gamachu and Ibrahim [3] investigated the mixed convection hybrid viscoelastic nanofluid. The heat exchange of the viscoelastic nanofluid past the stretched surface with many impacts was studied by [4]. In [5], a corrugated channel was considered to study the heat transport of the graphene nanofluid. [6] examined the influence of viscous dissipation on the viscoelastic nanofluid due to a circular cylinder. Numerical examination of the graphene nanofluid because of the stretchable wall was conducted by [7]. [8] directed the enhanced thermal progress of the graphene hybrid nanofluid past a stretched sheet. The impact of zero nanoparticle flux and hall current regarding the movement of the nanofluid above a stretched wall was discussed by [9]. Several other researchers studied the graphene nanofluid in [1015]. Recently, [16] examined the MHD nanofluid past a convectively heated Riga plate placed horizontally, embedded in the porous (Darcy−Forchheimer) medium. The EMHD flow of a heterogeneous micropolar mixture with different concentrations of water, ethylene glycol, and copper oxide nanoparticles was discussed by [17]. Due to the distributions of the polymer/CNT structure nanocomposite material, morphological nanolayers have an influence on the movement of hybrid nanofluids which was studied by [18]. [19] analyzed the tetragonal nanoparticles with a variety of density and conductivity characteristics flowing in 3D using non-linear Boussinesq and Rosseland estimations. Recent research investigates how the presence of nanoparticles can significantly improve heat exchange in a variety of physical geometries [2022]. [23] examined the analytical answers for a thermal conductor force peristaltic flow to temperature-dependent nanofluid viscosity. Utilizing two distinct methods for nanofluid analysis, the silver−water nanofluid electro-osmotic movement that is controlled by peristalsis was investigated by [24]. [25] studied the electro-osmotically assisted peristaltic pressurization of the MoS2 Rabinowitsch nanofluid and produced randomness. The use of novel nanofluids throughout clinical isolates to fight Staphylococcus aureus was investigated by [26]. Many researchers talked about boundary layer problems in various media [2729].

The investigation of the convective boundary layer flows across a stretched surface has a broad range of uses in the polymer production sector. For example, it is employed in manufacturing fibers, polymeric extruder, and fiber glass, sheet manufacturing, condensing of aqueous films, food production, growth of crystals, and fabrication of artificial films [4]. The idea of a boundary layer flow above a stretching sheet was promoted by [30]. [31] examined the velocity slip impact on the MHD nanofluid because of the stretched sheet. The study of the magnetite nanofluid provoked by a stretching wall was observed by [32]. [33] introduced the system disorder inside the nanofluid past a stretchable wall. The MHD nanofluid with two different nanoparticles due to a heated stretched wall was analyzed by [34]. [35] revealed the linearly stretched sheet-induced double-diffusive time-dependent magnetohydrodynamic flow of the nanofluid involving convection boundary constraints. Optimizing entropy production with an unstable stagnating Casson nanofluid flow having dual chemical changes across a stretched surface was discussed by [36]. The investigation of the nanofluid with many effects above a stretching sheet was presented in [3739].

From the potential applications mentioned previously, we analyzed the MHD graphene−CMC−water nanofluid past a stretchable wall with Joule heating and velocity slip impact. The closed-form solutions were derived analytically. To understand the behavior of various physical parameters on the fluid temperature, Nusselt number, velocity, and skin friction, the numeric tables and graphs were portrayed.

2 Problem statement

In framing the model, the flow of an incompressible and steady MHD viscoelastic nanofluid (Walter’s liquid B type) across a stretchable sheet in two dimensions is investigated. The graphene and carboxymethyl cellulose (CMC) solution−water are taken as nanoparticles and host fluid, respectively. The fluid is made up of the region y > 0, where the x-axis runs alongside the stretched surface in a flow pattern and the y-axis runs perpendicular to the flow. With a velocity of u̲=cx+βu̲y, the surface is pulled in the x dimension. Furthermore, the magnetic field B0 is supplied normally toward the flowing fluid, and the consequences of thermal radiation are also utilized. The basic equations regulating the flow are as follows [6]:

u̲x+v̲y=0,(1)
u̲u̲x+v̲u̲y=μgnfρgnf2u̲y2k0inu̲3u̲xy2+v̲3u̲y3+u̲x2u̲y22u̲xyu̲yσgnfBx2ρgnfu̲.(2)

The problem’s appropriate boundary criteria are as follows [40]:

u̲=cx+βu̲y,v̲=0aty=0,u̲=0asy,(3)

where c is the stretching rate, β is the slip factor, νgnf is the kinematic viscosity, k0in is the initial relaxation time distribution function, ρgnf is the density, B(x) is the magnetic parameter, u̲ and v̲ are the coordinates of the flowing fluid, μgnf is the dynamic viscosity, and αgnf is the thermal diffusivity. The nanofluid is represented by the notation gnf. The thermal attributes are represented as follows [40]:

αgnf=kgnfρcpgnf,μgnf=μfc1ϕ2.5,ρcpgnf=ϕρcpgnf+1ϕρcpfc,ρgnf=ϕρgnf+1ϕρfc,νgnf=μgnfρgnf,kgnf=kgnfkfc+2kfc2kfc2kfckgnf2ϕkgnf+2kfc+ϕkfckgnf,σgnf=3ϕσfcσgnfσfc1ϕσgnfσfc1+σgnfσfc+2+σfc.(4)

In Eq. 4, ρfc is the density, ρcpfc= is the effective heat capacity, ϕ is the particle volume ratio, kfc is the thermal conductivity of the base liquid, and kgnf is the nanoparticle thermal conductivity. The accompanying similarity variables have been proposed to non-dimensionalize the basic equations [40]:

u̲=cxfη,v̲=νc1/2fη,η=ycν1/2,θη=TTTwT.(5)

Applying Eqs 5, 2 and Eq. 3 become as:

fτ2τ1f2τ1Mgnf+τ2τ1ffτ2τ1Kveffiv+2fff2=0,(6)
fη=0,fη=1+βsf0,atη=0,fη0asη.(7)

Here, the slip parameter is βs = β(c/ν)1/2, τ1 = (1 − ϕ)2.5, τ2=ρgnfρfcϕϕ+1, Kve=ck0inνfc is the viscoelastic parameter, and Mgn=2βsσfcB02ρ is the Hartmann number. The solution of Eq. 6 in a closed form is as follows [41]:

fη=γ1+γ2eϒη.(8)

Using Eq. 7, we determine the answer to Eq. 6, as shown as follows:

fη=1βsϒ2+ϒeϒηβsϒ2+ϒ.(9)

Applying Eq. 6 and Eq. 9 together, we gain

ϒ=λ1+123τ1λ2λ3βs836βs+2λ43βsλ5+123τ1λ6λ7βs243+τ1τ2Kve13βs,(10)

where

λ1=8τ13τ23Kve3+36τ12τ2Kveβs2Mgn24τ12τ22Kve2+72τ1Mgnβs2+108τ1τ2βs2+24τ1τ2Kve,(11)
λ2=Kve2Mgn2βs2τ13τ22+4Kve3Mgnτ13τ23+4Kve3τ13τ244Mgn3βs4τ12+20KveMgn2βs2τ12τ2+18KveMgnβs2τ12τ22,(12)
λ3=12Kve2Mgnτ12τ2212Kve2τ12τ23+8Mgn2βs2τ1+36Mgnβs2τ1τ2+27βs2τ1τ22+12KveMgnτ1τ2+12Kveτ1τ224Mgn4τ2,(13)
λ4=τ12τ22Kve2+3τ1Mgnβs22τ1τ2Kve+1,(14)
λ5=8τ13τ23Kve3+36τ12τ2Kveβs2Mgn24τ12τ22Kve2+72τ1Mgnβs2+108τ1τ2βs2+24τ1τ2Kve,(15)
λ6=Kve2Mgn2βs2τ13τ22+4Kve3Mgnτ13τ23+4Kve3τ13τ244Mgn3βs4τ12+20KveMgn2βs2τ12τ2+18KveMgnβs2τ12τ2212Kve2Mgnτ12τ22,(16)
λ7=12Kve2τ12τ23+8Mgn2βs2τ1+36Mgnβs2τ1τ2+27βs2τ1τ22+12KveMgnτ1τ2+12Kveτ1τ224Mgn4τ2,(17)

where γ1, γ2, and ϒ are the constants.

3 Heat transfer analysis

This section describes the heat exchange investigation under the influence of Joule heating and thermal radiation phenomenon. The following is the elementary equation [42]:

u̲Tx+v̲Ty=αgnf2Ty21ρcpgnfqrady+σgnfBx2ρcpgnfu̲2,(18)

where

qrad=σ*3k*T4y.(19)

Putting Eq. 19 into Eq. 18, we acquire the following:

u̲Tx+v̲Ty=αgnf2Ty2+42σ*T3k*3ρcpgnf2Ty2+σgnfBx2ρcpgnfu̲2,(20)

and the boundary restrictions are as follows:

T=Tw=T+T0crx/c2aty=0,TTasy.(21)

Here, T is the temperature field, c is the characteristic length, T0cr is the constant reference temperature, αgnf is the thermal diffusivity, cpgnf is the specific heat, Tw is the wall temperature, k* is the mass absorption coefficient, T = is the free stream temperature, and σ* is the Stefan−Boltzmann constant. After applying Eq. 5 and Eq. 21 together, the corresponding non-dimensional energy equation is obtained as follows:

ΩPrθηη2fηθ+fθη+EcrtMgnτ4fη2=0,(22)

where

Ecrt=u̲2ΔTcp,Pr=νfcαfc,χ=k*kfc22σ*T3,Ω=τ3τ43χτ3+43χτ3τ3=kgnf+2kfc2ϕkfckgnfkgnf+2kfc+2ϕkfckgnf,τ4=1ϕ+ϕρcpgnfρcpfc.(23)

Here, χ is the radiation entity, Ecrt is the Eckert number, and Pr is the Prandtl number. The modified boundary constraints are as follows:

θη=1atη=0,θη0asη.(24)

Consequently, it is simple to obtain by entering Eq. 9 into Eq. 24, expressed as

ΩPrθηη2eϒηβsϒ+1θ+1βsϒ2+ϒeϒηβsϒ2+ϒθη+EcrtMgnτ4eϒηβsϒ+12=0.(25)

To convert Eq. 26 into Kummer’s ordinary differential equation, a latest expression is established:

ζ=PreϒηΩϒ2βsϒ+1.(26)

As a consequence, Eq. 26 is converted into Kummer’s ordinary differential equation, which is as follows:

ζ2θζ2+κζθζ+2θ=EcrtMgnτ4eϒηβsϒ+12,(27)

where κ = (1 − κ1) and κ1=PrΩϒ2(βsϒ+1). The updated boundary requirements are as follows:

θζ=1,θ0=0.(28)

With respect to Kummer’s functions [43], the closed-form solution of Eq. 28 accompanying Eq. 29 is:

θ(ζ)=(ζΨ1Ψ2Ecrt,ϒ2)Ω2Prτ4Ψ4Ψ5+ζΨ6ϒ2Ωβsϒ+1PrΨ7Ψ2Ψ92Ψ6Ψ7Ψ3Ω2ϒ4τ4Ψ4Ψ5+ζMgnEcrtϒ2Ω2Prτ4,(29)

where

Ψ1=1Prβsϒ+1Ωϒ22+2ζ+11Prβsϒ+1Ωϒ2+ζ2+2ζ,
Ψ2=M2+Prβsϒ+1Ωϒ2,1+Prβsϒ+1Ωϒ2,ζ,
Ψ3=M2+Prβsϒ+1Ωϒ2,1+Prβsϒ+1Ωϒ2,Prβsϒ+1Ωϒ2,
Ψ4=1Prβsϒ+1Ωϒ2,Ψ5=2Prβsϒ+1Ωϒ2,Ψ6=Prβsϒ+1Ωϒ2,
Ψ7=Prβsϒ+1Ωϒ2,Ψ8=2ζEcrtMgnϒ4Ω2Prβsϒ+1Pr,
Ψ9=2Ω2ϒ4τ4Ψ42+2Ω2ϒ4τ4Ψ4+Ψ4Ψ8Ψ8+ζEcrtMgnPrϒ2Ωβsϒ+12.

Here, M is the confluent hypergeometric function. The solution of the energy equation is as follows:

θη=ω1Ψ2Ecrteϒη2βsϒ+2τ4Ψ4Ψ5+Ψ6eϒηΨ7ω2ω92Ψ6Ψ7Ψ3Ω2ϒ4τ4Ψ4Ψ5EcrtMgneϒη2βsϒ+2τ4,(30)

where

ω1=1Prβsϒ+1Ωϒ22+2Preϒηβsϒ+1Ωϒ2+11Prβsϒ+1Ωϒ2+Pr2eϒη2βsϒ+12Ω2ϒ4+2Preϒηβsϒ+1Ωϒ2,
ω2=M2+Prβsϒ+1Ωϒ2,1+Prβsϒ+1Ωϒ2,Preϒηβsϒ+1Ωϒ2,
ω8=2EcrtMgneϒηϒ2ΩPrβsϒ+12,
ω9=2Ω2ϒ4τ4Ψ42+2Ω2ϒ4τ4Ψ4+Ψ4ω8ω8EcrtMgneϒηPr2βsϒ+13.
θη0=A3MgnEcrt2βsϒ+2τ4A1A2+A4MgnEcrtϒ2βsϒ+2τ4A1A2+A5PrA8A62βsϒ+1Ω3ϒ5A5A8τ4A1A2A10,(31)

where

A1=1Prβsϒ+1Ωϒ2,A2=2Prβsϒ+1Ωϒ2,A3=2prA1ϒβsϒ+1Ω2Pr2βsϒ+12Ω2ϒ32Prϒβsϒ+1Ω,A4=A12+2Prβsα+1Ωϒ2+1A1+Pr2βsϒ+12Ω2ϒ4+2prβsϒ+1Ωϒ2,A5=Prβsϒ+1Ωϒ21A1,A6=2EcrtMgnA1ϒ2ΩPrβsϒ+12+2Ω2ϒ4τ4A122EcrtMgnϒ2ΩPrβsα+12+2Ω2ϒ4A4A1EcrtMgnPr2βsϒ+13,A7=2EcrtMgnϒ3A1ΩPrβsϒ+12+2EcrtMgnϒ3ΩPrβsϒ+12+EcrtMgnϒePr2βsϒ+13,A8=MA2,1+Prβsϒ+1Ωϒ,A11,A9=MA1,2+Prβsϒ+1Ωϒ2,A11,A10=A9PrA6ϒ5βsα+1Ω3A8τ4A12+2Prβsϒ+1Ωϒ21A712Ω2ϒ4τ4A1A2.

4 Skin friction and the local Nusselt number

The expression for the local skin friction is as follows:

Cf=τwρu̲w2=Rex1/2τ1f0,τ1CfRex1/2=f0,(32)

where τw=μgnfu̲yy=0 and Rex=xu̲wν are the stress at the wall and the Reynolds number, respectively.

The local Nusselt number is defined as follows:

Nu=kgnfxkfcTwTTyy=0=kgnfkfcRex1/2θη0.(33)

It is obtained as follows in the present study:

kfckgnfNuxRex1/2=θη0.(34)

5 Results and discussion

We have analyzed the fluid flow and energy transport of the MHD viscoelastic nanofluid past a stretching surface with the effects of velocity slip and thermal radiation entity. The influence of several emerging parameters such as ϕ, Mgn, βs, Kve, Ecrt, Pr, and χ on f′(η), θ(η), −f′′(0), and −θ′(0) is shown. In this connection, we have drawn the graphs and the corresponding numerical tables. The physical perspective of the considered model is depicted in Figure 1. Figures 25 are created to discuss the influence of these parameters on the velocity field. In Figure 2, the variation in ϕ above the velocity field is illustrated. It is noted that the magnitude of the velocity distribution is enhanced by an increment in the values of ϕ. Figure 3 depicts the variation in Mgn with βs, Kve, and ϕ. The velocity field diminishes as the Mgn increases. Physically, the Lorentz forces are dominant, which causes the velocity field to de-escalate while increasing the magnitude of Mgn. The influence of βs on f′(η) is portrayed in Figure 4. It is perceived that increasing the amount of βs causes the velocity distribution to drop rapidly. Actually, when the velocity slip occurs, the stretching surface velocity is faster than the fluid velocity, resulting in a decrease in the velocity of the nanofluid. The influence of Kve on the velocity field is delineated in Figure 5. Physically, viscoelasticity creates a tensile force that opposes fluid movement. Due to viscous and elastic factors, escalating values of Kve cause a reduction in the flow velocity.

FIGURE 1
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FIGURE 1. Model’s physical perspective.

FIGURE 2
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FIGURE 2. Impact of ϕ with Mgn = 2, βs = 1, and Kve = 1 on velocity profiles.

FIGURE 3
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FIGURE 3. Impact of Mgn with ϕ = 0.1, βs = 1, and Kve = 1 on velocity profiles.

FIGURE 4
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FIGURE 4. Impact of βs with Mgn = 2, ϕ = 0.1, and Kve = 1 on velocity profiles.

FIGURE 5
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FIGURE 5. Impact of Kve with Mgn = 2, ϕ = 0.1, and βs = 1 on velocity profiles.

Figures 611 investigate the effects of ϕ, Mgn, βs, Ecrt, Pr, and χ on θ(η). Figure 6 shows the temperature field against the nanoparticle ratio. It implies that the temperature field is enhanced with an enlargement in the magnitude of ϕ. Physically, the thermal conductivity of the fluid is enhanced by adding nanoparticles. Consequently, the temperature decreases. The behavior of the temperature field against Mgn is studied in Figure 7. It is revealed that a rise in Mgn causes the fall in temperature distribution. It is due to friction between the fluid and nanoparticles by Lorentz forces that leads to an increase in the temperature field. The development of Pr on θ(η) is shown in Figure 8. The temperature field is observed to rise, increasing the magnitude of Pr. The Prandtl number, in terms of physics, is the fraction of momentum diffusivity to thermal diffusivity. Thermal diffusivity is enhanced by adding nanoparticles, which causes a decrement in temperature distribution. Figure 9 illustrates the impact of Eert over θ(η). It is discovered that increasing Eert increases the magnitude of θ(η). The influence of the thermal radiation parameter on θ(η) is depicted in Figure 10. It demonstrates that the magnitude of θ(η) de-escalates, while the magnitude of χ increases. Figure 11 shows how decreasing the amount of χ increases the value of θ(η).

FIGURE 6
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FIGURE 6. Impact of ϕ with Mgn = 1, βs = 1, Kve = 1, Ecrt = 0.3, Pr = 6.2, and χ = 0.3 on the temperature profile.

FIGURE 7
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FIGURE 7. Impact of Mgn with ϕ = 0.1, βs = 1, Kve = 1, Ecrt = 0.1, Pr = 6.2, and χ = 0.3 on the temperature profile.

FIGURE 8
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FIGURE 8. Impact of Pr with ϕ = 0.1, βs = 1, Kve = 1, Ecrt = 0.1, Mgn = 0.5, and χ = 1 on the temperature profile.

FIGURE 9
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FIGURE 9. Impact of Ecrt with ϕ = 0.1, βs = 1, Kve = 1, Pr = 6.2, Mgn = 0.5, and χ = 1 on the temperature profile.

FIGURE 10
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FIGURE 10. Impact of χ with ϕ = 0.1, βs = 1, Kve = 1, Pr = 6.2, Mgn = 0.5, and Ecrt = 0.1 on the temperature profile.

FIGURE 11
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FIGURE 11. Impact of βs with ϕ = 0.1, χ = 1, Kve = 1, Pr = 6.2, Mgn = 0.5, and Ecrt = 0.1 on the temperature profile.

Figures 1214 investigate the change in Mgn, βs, and ϕ over −f′′(0). The local skin friction factor is decreased with the growing magnitude of Mgn as shown in Figure 12. Physically, magnetic fields and electric forces produce Lorentz forces that create resistance forces because of which the skin friction on the wall increases. Figure 13 and Figure 14 show a plot of −f′′(0) versus βs and ϕ, respectively. It is perceived that the local skin friction field is decreased with an augmentation in βs, and an opposite trend is shown for ϕ. Figures 1518 scrutinize the variation in Mgn, Ecrt, Pr, and χ over −θ′(0). The impact of Mgn on −θ′(0) against ϕ is presented in Figure 15, which shows a decrement in the amount of −θ′(0). Figure 16 depicts the effects of the Eckert number on the dimensionless temperature variation, −θ′(0). It can be seen that when the Eckert number increases, −θ′(0) also increases. The Eckert number Ecrt is expressed as the ratio of advective transmission to energy-dissipated capability in physical terms. Furthermore, a rise in the rate of heat transport suggests that the energy loss is accompanied by a fall in the Eckert number. Figure 17 and Figure 18 express the influence of Pr and χ on the heat exchange ratio. It is discovered that θ′(0) is augmented while the strengths of Pr and χ are increased.

FIGURE 12
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FIGURE 12. Impact of Mgn with βs = 0.5 and Kve = 0.5 on −f′′(0).

FIGURE 13
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FIGURE 13. Impact of βs with ϕ = 0.1 and Kve = 0.5 on −f′′(0).

FIGURE 14
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FIGURE 14. Impact of ϕ with βs = 0.5 and Kve = 0.5 on −f′′(0).

FIGURE 15
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FIGURE 15. Impact of Mgn with Ecrt = 0.3, βs = 0.5, Kve = 0.5, Pr = 6.2, and χ = 0.5 on −θ′(0).

FIGURE 16
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FIGURE 16. Impact of Ecrt with ϕ = 0.1, βs = 0.5, Kve = 0.5, Pr = 6.2, and χ = 0.5 on −θ′(0).

FIGURE 17
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FIGURE 17. Impact of Pr with ϕ = 0.1, Ecrt0, βs = 0.5, Kve = 0.5, and χ = 0.5 on −θ′(0).

FIGURE 18
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FIGURE 18. Impact of χ with Ecrt = 0.3, Pr = 6.2, βs = 0.5, Kve = 0.5, and ϕ = 0.1 on −θ′(0).

The thermophysical characteristics of graphene and CMC−water are displayed in Table 1. Tables 2, 3 show the numerical values of local skin friction coefficient and local Nusselt number respectively. Figures 1924 indicate the streamline characteristics. It has been shown that the boundary-layer thickness dramatically shrinks when Kve is increased.

TABLE 1
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TABLE 1. Host fluid (carboxymethyl cellulose−water) and nanoparticle (graphene) thermophysical characteristics [5].

TABLE 2
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TABLE 2. Numerical table of −f′′(0) with ϕ = 0.1.

TABLE 3
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TABLE 3. Numerical table of −θ′(0) with Kve = 0.5, ϕ = 0.1, and χ = 0.5.

FIGURE 19
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FIGURE 19. Impact of ϕ = 0 with Mgn = 0.5, βs = 0.5, and Kve = 0.5 on the flow regime.

FIGURE 20
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FIGURE 20. Impact of ϕ = 0.1 with Mgn = 0.5, βs = 0.5, and Kve = 0.5 on the flow regime.

FIGURE 21
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FIGURE 21. Impact of ϕ = 0.2 with Mgn = 0.5, βs = 0.5, and Kve = 0.5 on the flow regime.

FIGURE 22
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FIGURE 22. Impact of Kve = −15 with βs = 0.5, ϕ = 0.1, and Mgn = 0.5 on the flow regime.

FIGURE 23
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FIGURE 23. Impact of Kve = 0 with Mgn = 0.5, βs = 0.5, and ϕ = 0.1 on the flow regime.

FIGURE 24
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FIGURE 24. Impact of Kve = 15 with Mgn = 0.5, βs = 0.5, and ϕ = 0.1 on the flow regime.

6 Conclusion

In this study, the analysis of the MHD graphene−CMC−water nanofluid past a stretchable wall with Joule heating and velocity slip impact was performed. We arrived at the following conclusions:

• The velocity profile is the growing function of Mgn, βs, and Kve, with the reversed mode shown in case of ϕ.

• The temperature profile is the declining function of Pr, Ecrt, ϕ, and χ, while a contradictory trend is observed for Mgn and βs.

• Increasing the magnitude of Mgn increases local skin friction, while βs and ϕ reveal an opposing trend.

• An increase in Ecrt, Pr, and χ is shown to be accountable for an increase in the fraction of heat exchange. As Mgn increases, the heat transmission rate decreases.

• An enhancement in Kve decreases the boundary-layer thickness which is examined in the flow regime.

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

IR initiated the fluid model and methodology. TZ and IR produced numerical data and graphs using software. SI completed the write-up. MA and SE assisted in numerical data and write up.

Acknowledgments

The authors are grateful to the University of Management and Technology of Lahore, and HEC Pakistan for facilitating this research under research project No 15911 (NRPU).

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: graphene nanoparticles, slip effect, thermal radiations, magnetic field, closed-form solution

Citation: Rashid I, Zubair T, Asjad MI, Irshad S and Eldin SM (2023) The MHD graphene−CMC−water nanofluid past a stretchable wall with Joule heating and velocity slip impact: Coolant application. Front. Phys. 10:1065982. doi: 10.3389/fphy.2022.1065982

Received: 10 October 2022; Accepted: 25 November 2022;
Published: 30 January 2023.

Edited by:

Andrea Scagliarini, Institute for Calculation Applications Mauro Picone (CNR), Italy

Reviewed by:

Nehad Ali Shah, Sejong University, South Korea
Noreen Sher Akbar, National University of Sciences and Technology (NUST), Pakistan

Copyright © 2023 Rashid, Zubair, Asjad, Irshad and Eldin. 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: I. Rashid, mehar.irfan014@gmail.com; M. I. Asjad, imran.asjad@umt.edu.pk

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