Numerical simulation of the flow within and over an intersection model with Reynolds-averaged Navier--Stokes method |
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| Authors: | Li Lei Hu Fei Cheng Xue-Ling Jiang Jin-Hua Ma Xiao-Guang |
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| Affiliation: | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Beijing Meteorological Bureau, Beijing 100089, China |
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| Abstract: | In this study, the Reynolds-averaged Navier--Stokes (RANS) method isemployed to simulate the flow within andover an intersection model with three kinds of textit{k--$varepsilon $}turbulence closure schemes,namely, standard model, renormalization group (RNG) model and realizabletextit{k--$varepsilon $} model. The comparisonbetween the simulated and observed flow fields shows that the RANS simulationwith all the three turbulence models cannot completely and accurately reproducethe observed flow field in all details. A detailed comparison between thepredicted profiles of wind velocities and the measured data shows that therealizable textit{k--$varepsilon $} model is the best one among the three turbulence closure modelsin general. However, the extent to which the improvement is achieved bythe realizabletextit{k--$varepsilon $} model is still not enough to completely andaccurately describe the turbulent flow in a relatively complexenvironment. |
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| Keywords: | RANS numerical simulation intersection turbulenceclosure model |
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