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Numerical Investigation of Cavitation Interacting with Pressure Wave

Published online by Cambridge University Press:  09 August 2018

J. G. Zheng  and
B. C. Khoo
J. G. Zheng*
Affiliation:
Temasek Laboratories, National University of Singapore, Singapore 117411. Department of Mechanical Engineering, National University of Singapore, Singapore 119260.
B. C. Khoo*
Affiliation:
Temasek Laboratories, National University of Singapore, Singapore 117411. Department of Mechanical Engineering, National University of Singapore, Singapore 119260. Singapore-MIT Alliance, National University of Singapore, Singapore 117576.
*
*Corresponding author.Email address:[email protected]
Email: [email protected]
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Abstract

A computational fluid dynamics solver based on homogeneous cavitation model is employed to compute the two-phase cavitating flow. The model treats the two-phase regime as the homogeneous mixture of liquid and vapour which are locally assumed to be under both kinetic and thermodynamic equilibrium. As our focus is on pressure wave formation, propagation and its impact on cavitation bubble, the compressibility effects of liquid water have to be accounted for and hence the flow is considered to be compressible. The cavitating flow disturbed by the introduced pressure wave is simulated to investigate the unsteady features of cavitation due to the external perturbations. It is observed that the cavity becomes unstable, locally experiencing deformation or collapse, which depends on the shock wave intensity and freestream flow speed.

Keywords

35L4065M0865M2276T10Isentropic cavitation modelcavitating flowpressure wave
Type
Research Article
Information
Numerical Mathematics: Theory, Methods and Applications , Volume 7 , Issue 4 , November 2014 , pp. 524 - 536
Copyright
Copyright © Global Science Press Limited 2014

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