A numerical model for evolution of internal structure of cloud cavitation

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	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)
	2019
会议日期	April 10, 2016 - April 15, 2016
会议地点	Honolulu, HI, United states
关键词	Bubble break up Bubble clusters Bubble number densities Cloud cavitations Condensation rates Dimension analysis Evolution modeling Reynolds Averaged Navier Stokes Equations
英文摘要	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.
会议录	Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016
语种	英语
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/80466]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	Institute of Mechanics, Chinese Academy of Sciences, Beijing; 100190, China
推荐引用方式 GB/T 7714	Du TZ,Huang CG,Wang YW. A numerical model for evolution of internal structure of cloud cavitation[C]. 见:. Honolulu, HI, United states. April 10, 2016 - April 15, 2016.