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Study of Characteristics of Cloud Cavity Around Axisymmetric Projectile by Large Eddy Simulation
Title:  Study of Characteristics of Cloud Cavity Around Axisymmetric Projectile by Large Eddy Simulation
Author:  Yu XX(于娴娴);  Huang CG(黄晨光);  Du TZ(杜特专);  Liao LJ(廖丽娟);  Wu XC;  Zheng Z;  Wang YW(王一伟)
Reprint Author: Wang, YW (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Abstract:  Cavitation generally occurs where the pressure is lower than the saturated vapor pressure. Based on large eddy simulation (LES) methodology, an approach is developed to simulate dynamic behaviors of cavitation, using k - mu transport equation for subgrid terms combined with volume of fluid (VOF) description of cavitation and the Kunz model for mass transfer. The computation model is applied in a 3D field with an axisymmetric projectile at cavitation number sigma = 0.58. Evolution of cavitation in simulation is consistent with the experiment. Clear understanding about cavitation can be obtained from the simulation in which many details and mechanisms are present. The phenomenon of boundary separation and re-entry jet are observed. Re-entry jet plays an important role in the bubble shedding.
URL:  http://dx.doi.org/10.1115/1.4026583
Journal Title:  JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME