A numerical model for cloud cavitation based on bubble cluster. Issue 4 (July 2017)

• Record Type: Journal Article
• Authors: Du, Tezhuan; Wang, Yiwei; Huang, Chenguang; Liao, Lijuan
• Is Part Of: Theoretical & applied mechanics letters. Volume 7:Issue 4(2017)
• Page Start: 231
• Page End: 234
• Publication Date: 2017-07
• Subjects: Cavitation model -- Bubble number density -- Bubble cluster -- Collapse; Mechanics, Applied -- Periodicals; Mechanics, Analytic -- Periodicals; Mechanics, Analytic; Mechanics, Applied; Periodicals; 620.1
• DOI: 10.1016/j.taml.2017.08.001
• Languages: English
• ISSNs: 2095-0349

Abstract

Abstract: The cavitation cloud of different internal structures results in different collapse pressures owing to the interaction among bubbles. The internal structure of cloud cavitation is required to accurately predict collapse pressure. A cavitation model was developed through dimensional analysis and direct numerical simulation of collapse of bubble cluster. Bubble number density was included in proposed model to characterize the internal structure of bubble cloud. Implemented on flows over a projectile, the proposed model predicts a higher collapse pressure compared with Singhal model. Results indicate that the collapse pressure of detached cavitation cloud is affected by bubble number density. Highlights: The structure of cloud cavitation is needed to accurately predict collapse pressure. A cavitation model was developed through dimensional analysis and CFD simulation. Bubble number density was used to characterize the internal structure of cavitation. This model is implemented on cavitating flow over a projectile with conical head. The results show that the collapse pressure is affected by bubble number density.