AUTHOR=Liu Benqing , Yang Wei , Liu Zhuqing 

TITLE=A PANS Method Based on Rotation-Corrected Energy Spectrum for Efficient Simulation of Rotating Flow

JOURNAL=Frontiers in Energy Research

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.894258

DOI=10.3389/fenrg.2022.894258

ISSN=2296-598X

ABSTRACT=<p>A partially averaged Navier–Stokes method with a new expression of <italic>f</italic><sub><italic>k</italic></sub> based on the rotation-corrected energy spectrum is proposed. It is coupled with the shear-stress transport turbulence model to simulate two typical rotating flows: rotating channel flow and flow in a centrifugal pump impeller. The results of two traditional energy spectrum-based <italic>f</italic><sub><italic>k</italic></sub> expressions (ES1 and ES2) and DNS/experimental results are used for comparison. The results show that the <italic>f</italic><sub><italic>k</italic></sub> distribution predicted based on the rotation-corrected energy spectrum is more reasonable. In the region with enhanced turbulence, more turbulence scales exist, such as the pressure side in the rotating channel flow, where the <italic>f</italic><sub><italic>k</italic></sub> value is low and more turbulence scales are resolved. While in the region with suppressed turbulence, fewer turbulence scales exist, such as the suction side, where the <italic>f</italic><sub><italic>k</italic></sub> value is relatively high. The model with a new <italic>f</italic><sub><italic>k</italic></sub> expression can produce better results since it can give a more reasonable <italic>f</italic><sub><italic>k</italic></sub> distribution. At the same time, the new model is more efficient since it shows better calculation performance with the same mesh scale and low cost with comparable calculation performance.</p>