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| Numerical evaluation of viscous energy dissipation of fluid using lattice Boltzmann method |
| Received:April 01, 2014 Revised:August 28, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201503013 |
| KeyWord:lattice Boltzmann method moment method dissipation simulation optimization |
| Author | Institution |
| 刘耕 |
中国科学院 长春光学精密机械与物理研究所, 长春 ;中国科学院大学, 北京 |
| 陈涛 |
中国科学院 长春光学精密机械与物理研究所, 长春 |
| 刘震宇 |
中国科学院 长春光学精密机械与物理研究所, 长春 |
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| Abstract: |
| The lattice Boltzmann method (LBM) is a new discrete numerical method to solve the fluid mechanics.As it develops,the method has been widely used in the numerical simulation and optimization of flows.Therefore,it is a straightforward requirement to evaluate the value of viscous dissipation of flow accurately with LBM.This paper presents a detailed procedure to calculate fluid viscous dissipation using the LBM.Other than the traditional finite difference method,the fluid viscous energy dissipation in this paper is solved by a lattice-Boltzmann-moment based approach.The moment based approach not only avoids the inapplicability that the finite difference method may have near the boundaries,but also works with a local algorithm which can be directly implemented on the high performance computers with the large-scale parallel computing techniques.Based on the precision analysis of this new numerical scheme,the optimization of an ellipsoid block in a straight channel flow is provided.The analysis and the example prove that the presented method is practically feasible and quantitatively valid. |