A numerical study of turbulent supersonic isothermal-wall channel flow

Coleman, Gary N., Kim, John and Moser, R.D. (1995) A numerical study of turbulent supersonic isothermal-wall channel flow Journal of Fluid Mechanics, 305, pp. 159-183. (doi:10.1017/S0022112095004587).


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A study of compressible supersonic turbulent flow in a plane channel with isothermal walls has been performed using direct numerical simulation. Mach numbers, based on the bulk velocity and sound speed at the walls, of 1.5 and 3 are considered; Reynolds numbers, defined in terms of the centreline velocity and channel half-width, are of the order of 3000. Because of the relatively low Reynolds number, all of the relevant scales of motion can be captured, and no subgrid-scale or turbulence model is needed. The isothermal boundary conditions give rise to a flow that is strongly influenced by wall-normal gradients of mean density and temperature. These gradients are found to cause an enhanced streamwise coherence of the near-wall streaks, but not to seriously invalidate Morkovin's hypothesis : the magnitude of fluctuations of total temperature and especially pressure are much less than their mean values, and consequently the dominant compressibility effect is that due to mean property variations. The Van Driest transformation is found to be very successful at both Mach numbers, and when properly scaled, statistics are found to agree well with data from incompressible channel flow results.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1017/S0022112095004587
ISSNs: 0022-1120 (print)
ePrint ID: 71975
Date :
Date Event
Date Deposited: 13 Jan 2010
Last Modified: 18 Apr 2017 20:59
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/71975

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