Suppression of shock-induced separation in fluids having large bulk viscosities. (10th October 2014)

• Record Type: Journal Article
• Authors: Bahmani, F.; Cramer, M. S.
• Is Part Of: Journal of fluid mechanics. Volume 756(2014:Oct.)
• Publication Date: 2014-10-10
• Subjects: compressible boundary layers, -- compressible flows, -- shock waves; Fluid mechanics -- Periodicals; 532.005
• DOI: 10.1017/jfm.2014.494
• Languages: English
• ISSNs: 0022-1120

Abstract

Abstract: We examine the effect of large bulk viscosity on the classical problem of two-dimensional shock–boundary-layer interaction. The flow is taken to be steady and supersonic over a flat adiabatic plate. The boundary layer is taken to be laminar and the fluid is modelled as a perfect gas with a bulk viscosity that is large compared with its shear viscosity. The flow details are computed using a fifth-order weighted essentially non-oscillatory finite difference scheme and a third-order Runge–Kutta scheme for the spatial and temporal discretizations. The primary result of interest is the suppression of separation when the ratio of bulk to shear viscosity is sufficiently large.