Abstract:The Taylor-Couette flows in the gap between two concentric cylinders with smooth and 18-slit walls were studied using CFD method. The CFD method was validated with PIV experiments on the flow between two concentric cylinders with smooth walls and a very good agreement has been achieved. In the simulations, the periodic fluctuation properties in axial and radial velocities were quantized, and their profiles across the radius were discussed too. Importantly, a rule that the Taylor vortex size decreases with increasing Reynolds number was indentified. Interestingly, a Taylor vortex flow was also found in the gap with 18-slit walls at the same Reynolds number as the smooth walls. By comparing velocity and vorticity distributions across in the gap for two different wall profiles, it was found out the slit walls could alter the flow structure and strengthened vorticity significantly, and amplified the Taylor vortex size. As a result, the radial velocity in the mid-gap with slit walls was 20% larger than that with smooth walls. In addition, it was shown that there was an obvious vortex motion in the slit regions based on the predicted flow field in the circumferential plane in those regions.
刘栋, 朱鹣, 王颖泽, 杨晓勇, 王春林. 沟槽壁面对泰勒涡流稳定性影响的数值模拟[J]. 排灌机械工程学报, 2014, 32(3): 242-246.
Liu Dong, Zhu Jian, Wang Yingze, Yang Xiaoyong, Wang Chunlin. Numerical simulation of slit wall effect on Taylor-Couette flow stability. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(3): 242-246.
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