Numerical simulation of flow around square cylinder using different low-Reynolds number turbulence models |
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Authors: | Ling Zhang Jun-li Zhou Xiao-chun Chen Li Lan and Nan Zhang |
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Affiliation: | [1]College of Civil Engineering, Hunan University, Changsha 410082, China; [2]Building Energy Conservation and New Energy Sources Engineering Center, China Architecture Design and Research Group, Beijing 100044, China; [3]Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200240, China; [4]School of Civil and Architectural Engineering, Central South University, Changsha 410075, China |
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Abstract: | ABE-KONDOH-NAGANO, ABID, YANG-SHIH and LAUNDER-SHARMA low-Reynolds number turbulence models were applied to simulating unsteady turbulence flow around a square cylinder in different phases flow field and time-averaged unsteady flow field. Meanwhile, drag and lift coefficients of the four different low-Reynolds number turbulence models were analyzed. The simulated results of YANG-SHIH model are close to the large eddy simulation results and experimental results, and they are significantly better than those of ABE-KONDOH-NAGANO, ABID and LAUNDER-SHARMR models. The modification of the generation of turbulence kinetic energy is the key factor to a successful simulation for YANG-SHIH model, while the correction of the turbulence near the wall has minor influence on the simulation results. For ABE-KONDOH-NAGANO, ABID and LAUNDER-SHARMA models satisfactory simulation results cannot be obtained due to lack of the modification of the generation of turbulence kinetic energy. With the joint force of wall function and the turbulence models with the adoption of corrected swirl stream,flow around a square cylinder can be fully simulated with less grids by the near-wall. |
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Keywords: | low-Reynolds number turbulence model flow around square cylinder numerical simulation |
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