SIMPLE_ Pressure Boundary condition at the pipe wall

bbasal · July 30, 2009, 11:18

hello all

i want to write a computer code to solve Navier-Stokes equation (internal flow) by using SIMPLE algoritym. for pressure correction equation (possion equation), i need pressure boundary conditions at the pipe wall. what kind of boundary equation can be used at there.

sorry for my bad english

Vasilis · July 30, 2009, 11:20

At the walls you specify the velocity (no slip) not the pressure. If you need the pressure at the wall you can interpolate from the interior nodes

bbasal · July 30, 2009, 15:40

but there are no point to interpolate at the walls.you mean p(surface) equal p(surface-1)?

July 30, 2009, 11:18	SIMPLE_ Pressure Boundary condition at the pipe wall	#1
bbasal New Member Join Date: Jul 2009 Posts: 13 Rep Power: 17	hello all i want to write a computer code to solve Navier-Stokes equation (internal flow) by using SIMPLE algoritym. for pressure correction equation (possion equation), i need pressure boundary conditions at the pipe wall. what kind of boundary equation can be used at there. sorry for my bad english

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July 30, 2009, 11:20		#2
Vasilis New Member Join Date: Apr 2009 Posts: 17 Rep Power: 17	At the walls you specify the velocity (no slip) not the pressure. If you need the pressure at the wall you can interpolate from the interior nodes

July 30, 2009, 15:40		#3
bbasal New Member Join Date: Jul 2009 Posts: 13 Rep Power: 17	but there are no point to interpolate at the walls.you mean p(surface) equal p(surface-1)?