|A numerical model for evolution of internal structure of cloud cavitation|
|Du TZ(杜特专); Huang CG(黄晨光); Wang YW(王一伟)
|Source Publication||Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
|Conference Name||16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
|Conference Date||April 10, 2016 - April 15, 2016
|Conference Place||Honolulu, HI, United states
|Abstract||Interaction between bubbles in cloud cavitation play an important role in cavitating flows. A numerical model was developed to study the internal structure and collapse of cloud cavitation. The model consists of: (1) an evolution model of bubble number density taking bubble breakup effects into account; (2) a modified cavitation model based on dynamics of bubble cluster; and (3) the multi-phase Reynolds Averaged Navier-Stokes equations (RANS) for background flow. The evolution model of bubble number density is governed by a transport type equation and the expression of source term is derived from a bubble breakup model. The condensation rate is constructed through dimension analysis and direct simulation of collapse of bubble cluster. The proposed model was tested by flows over a projectile. The results show that the evolution of internal structure of the cloud cavitation is closely related to the development of re-entrant jet. Moreover, the performance of proposed model and the effects of bubble number density on cavitating flows are discussed. © Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016. All rights reserved.|
Bubble number densities
Reynolds Averaged Navier
|Affiliation||Institute of Mechanics, Chinese Academy of Sciences, Beijing; 100190, China|
Du TZ,Huang CG,Wang YW. A numerical model for evolution of internal structure of cloud cavitation[C]Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016,2019.
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