Hi, I'm trying to find expressions for fluid fluid in boundary layer for the case of N-S in a cylinder with permeable walls. Fluid is forced into the cylinder by external pressure, but the bulk of the flow in the cylinder will be longitudinal. High flow rate along the cylinder, turbulent. Sounds to be perfect for a boundary layer problem (radial flow in the boundary layer which disappears outside the viscous zone to become purely longitudinal, etc).(adsbygoogle = window.adsbygoogle || []).push({});

I've found some "hints" in the literature that the problem should be amenable to traditional Prandtl analysis because the longitudinal velocity is zero on the wall, no penetration of fluid into the permeable wall, and can assume the fluid in the wall is perpendicular to flow.

And yet I seem to be stuck. Any suggestions or publications to check out?

Thanks, John

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Navier-Stokes with Blowing Walls

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**