Numerical simulation of the effect of void fraction and inlet velocity on two-phase turbulence in bubble-liquid flows |
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| Authors: | Lixing Zhou Rongxian Li Ruxu Du |
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| Affiliation: | (1) Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China;(2) Shenzhen Research Institute, Tsinghua University, Shenzhen, China;(3) Department of Automation and Computer Aided Engineering, The Chinese University of Hong Kong, Hong Kong, China |
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| Abstract: | There are contradicted opinions on whether bubbles enhance or reduce the liquid turbulence. In this paper, the effect of void fraction and inlet velocity on the bubble–liquid two-phase turbulence of the multiple bubble–liquid jets in a two-dimensional channel is studied by using the two-phase second-order moment turbulence model. The results confirm the phenomena observed in experiments and reported in references that at a low void fraction and low inlet velocities the bubbles enhance the liquid turbulence, whereas at a high void fraction and high inlet velocities the bubbles reduce the liquid turbulence.The project supported by the China Special Funds for Major State Basic Research (G-1999-0222-08) and the Innovation and Technology Commission of Hong Kong and Aoyagi (H.K.) Ltd, Hong Kong, under the Grant No. UIM/122. The English text was polished by Keren Wang. |
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| Keywords: | Bubble– liquid flows Two-phase turbulence Second-order moment model |
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