Open AccessKelvin-Helmholtz instability in compressible fluids
Author(s) -
Lifeng Wang,
Wenhua Ye,
Fan Zhengfeng,
Sun Yan-Qian,
Bingsong Zheng,
Yingjun Li
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6381
Subject(s) - mach number , instability , compressibility , helmholtz free energy , mechanics , physics , compressible flow , mach wave , classical mechanics , thermodynamics
Kelvin-Helmholtz instability in two-dimensional compressible fluid is analyzed by the high precision numerical scheme. The linear growth rate of the Kelvin-Helmholtz instability is especially explored. The relations among the initial static pressure, conductive Mach number and linear growth rate of the Kelvin-Helmholtz instability are quantitatively achieved at the case of the low and high Mach numbers. The simulation results agree with the experiment results in free shear layers and mixing layers. Simulation results show that the conductive Mach number is the proper parameter in definition the compression effect. The smaller the conductive Mach number is, the less compressible the fluid is. The linear growth rate of the Kelvin-Helmholtz instability decreases with the increasing conductive Mach number.