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Old   April 17, 2005, 07:32
Default SUPERSONIC JET VISCOSITY
  #1
manish mehta
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Hi All,

I had a quick question... To get extremely accurate flow results would you neglect viscosity of a high Mach number(Ma=9) jet impinging on a flat plate? I realize the inertial term would be a lot greater than the viscous term, but I thought near the flat plate the viscosity term might be quite important. Can someone please help me with my dilemma?

Thank you.

Regards, Manish
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Old   April 19, 2005, 13:29
Default Re: SUPERSONIC JET VISCOSITY
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Harish
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At such high speeds you can usually neglect the viscous terms since the intertia term dominates. The boundary layer is pretty small for high speed flows . ( you can see this by non dimensionalising the N-S eqn and viscous terms have an order (1/Re).So you can neglect the viscous terms and still get accurate results.

-H
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