Numerical Simulation of the Low Reynolds Number Turbulence Model
碩士 === 中華大學 === 機械與航太工程研究所 === 94 === The objective of the research is to numerically study the turbulent flow structures over a 3D backward facing step. The numerical methods used in the present study are the finite-volume based SIMPLE algorisms coupled with a new modified low Reynolds number k-e t...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
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| Online Access: | http://ndltd.ncl.edu.tw/handle/16296986806313243091 |
| Summary: | 碩士 === 中華大學 === 機械與航太工程研究所 === 94 === The objective of the research is to numerically study the turbulent flow structures over a 3D backward facing step. The numerical methods used in the present study are the finite-volume based SIMPLE algorisms coupled with a new modified low Reynolds number k-e turbulence model. Four different turbulence models are examined in the present study. A new turbulence model is proposed through the modification of near wall damping function fm from the existing models. Computed results indicate that the flow over a 3D backward facing step with an expansion ratio of 1.3 and an aspect ratio of 4 is asymmetric and three-dimensional. The dimensionality effect on the flow field is elucidated in the present study.
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