Boundary Condition for variable Gradient

wilko · March 13, 2009, 10:35

Hello,

To determine the initial pressure in a incompressible flow I would like to use the following differential equation:

d(p)/d(x)=f(x)

Now I need a boundary condition for p to get the right wall values.
So far, my implementation uses the BC zeroGradient. This will lead to a boundary value that is exactly the cell value. But this is not the solution of the differential equation above.
What type of BC can be used here?

Best regards

Wilko

wilko · March 13, 2009, 12:30

Hello,

problem solved!! Not nice but it works.

Have a nice weekend

Wilko

March 13, 2009, 10:35	Hello, To determine the ini	#1
wilko New Member Wilko Rohlfs Join Date: Mar 2009 Location: Germany Posts: 5 Rep Power: 17	Hello, To determine the initial pressure in a incompressible flow I would like to use the following differential equation: d(p)/d(x)=f(x) Now I need a boundary condition for p to get the right wall values. So far, my implementation uses the BC zeroGradient. This will lead to a boundary value that is exactly the cell value. But this is not the solution of the differential equation above. What type of BC can be used here? Best regards Wilko

March 13, 2009, 12:30	Hello, problem solved!! Not	#2
wilko New Member Wilko Rohlfs Join Date: Mar 2009 Location: Germany Posts: 5 Rep Power: 17	Hello, problem solved!! Not nice but it works. Have a nice weekend Wilko

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