Level-set simulations of buoyancy-driven motion of single and multiple bubbles |
| |
| Institution: | 1. Heat and Mass Transfer Technological Center (CTTC), Universitat Politècnica de Catalunya – BarcelonaTech (UPC) ETSEIAT, Colom 11, 08222 Terrassa (Barcelona), Spain;2. Termo Fluids, S.L., Avda Jacquard 97 1-E, 08222 Terrassa (Barcelona), Spain;1. Heat and Mass Transfer Technological Center (CTTC), Universitat Politècnica de Catalunya – Barcelona Tech, ETSEIAT, Colom 11, 08222 Terrassa, Barcelona, Spain;2. Termo Fluids S.L., Av. Jacquard 97 1-E, 08222 Terrassa, Barcelona, Spain;1. Science and Technology on Reactor System Design Technology Laboratory, Chengdu 610041, China;2. Tsinghua University, Beijing 10084, China;3. Nuclear Power Institute of China, Chengdu 610041, China;4. School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907, USA;1. Research Institute of Green Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku Hamamatsu, Shizuoka 432-8561, Japan;2. Graduate School of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku Hamamatsu, Shizuoka 432-8561, Japan;1. Heat and Mass Transfer Technological Center (CTTC), Universitat Politècnica de Catalunya – BarcelonaTech, ETSEIAT, Colom 11, 08222 Terrassa, Barcelona, Spain;2. Termo Fluids S.L., Av. Jacquard 97 1-E, 08222 Terrassa, Barcelona, Spain |
| |
| Abstract: | This paper presents a numerical study of buoyancy-driven motion of single and multiple bubbles by means of the conservative level-set method. First, an extensive study of the hydrodynamics of single bubbles rising in a quiescent liquid is performed, including its shape, terminal velocity, drag coefficients and wake patterns. These results are validated against experimental and numerical data well established in the scientific literature. Then, a further study on the interaction of two spherical and ellipsoidal bubbles is performed for different orientation angles. Finally, the interaction of multiple bubbles is explored in a periodic vertical channel. The results show that the conservative level-set approach can be used for accurate modelling of bubble dynamics. Moreover, it is demonstrated that the present method is numerically stable for a wide range of Morton and Reynolds numbers. |
| |
| Keywords: | Bubble dynamics Level-set method Multiphase flow |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
