@Article{AAMM-14-777,
author = {Wang , WeiWang , JunLi , Zhiang and Lin , Zhiliang},
title = {Entropy Generation Analysis around Airfoil Using Multi-Block Lattice Boltzmann Method},
journal = {Advances in Applied Mathematics and Mechanics},
year = {2022},
volume = {14},
number = {3},
pages = {777--798},
abstract = {<p style="text-align: justify;">This present paper proposes aerodynamic forces and entropy generation
characteristics on the flow past two-dimensional airfoil at low Reynolds number by
multiple-relaxation-time lattice Boltzmann method to clarify the flow loss mechanism.
The block mesh refinement was adopted in which a higher accuracy was needed in
parts of the domain characterized by complex flow. The interpolated bounce-back
method was used to treat the irregular curve. This numerical method can effectively
solve the complex flow field simulation problems with reasonable accuracy and reliability by simulating flow around plate and airfoil. Based on second law of thermodynamics, an expression of entropy generation rate for arbitrary control volume was
derived theoretically which could accurately quantify the local irreversible loss of the
flow field at any position. After that, a comprehensive numerical study was conducted
to analyze relationship of entropy generation and drag force by taking NACA0012 airfoil as the research object. For unsteady condition, entropy generation rate and the
drag force are not linearly related any more. Losses due to steady effects mainly consider the irreversibility in the boundary layer and wake while the unsteady effects
come from the interaction between the main separation vortex and the trailing shedding vortex.</p>},
issn = {2075-1354},
doi = {https://doi.org/10.4208/aamm.OA-2020-0340},
url = {http://global-sci.org/intro/article_detail/aamm/20284.html}
}