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Stream function along solid boundary 
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#1
Jun514, 08:14 AM

P: 1

Hi, I am studying fluid mechanics and I am trying to get to grips with slip and noslip boundaries.
I know that: Slip > Occurs when fluid is inviscid so no viscous stress at boundary. Noslip > Viscous effects mean the the tangential velocity must be zero, relative to the boundary. Also, for both slip and noslip boundary conditions you have no normal flow if the boundary is solid and impermeable. However, the problem I have is that some say that if you have the no normal flow condition, then the stream function is constant regardless of whether it is a slip/noslip boundary (http://scicomp.stackexchange.com/que...reamfunctions). My lecturer however said that the stream function is constant only when it is a slip boundary. Any thoughts? Who is correct? 


#2
Jun514, 10:14 PM

Sci Advisor
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Thanks
PF Gold
P: 5,251

Look up in the literature the solutions for inviscid and viscous flow past a sphere. In both cases, the stream function is constant on the sphere. Chet 


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