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Old   June 21, 2013, 04:38
Default Random Boundary Condition
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Hi CFX-Users,

I'm trying to use a random boundary condition for a wall - e.g. thermal fluctuation. I want to insert a mean surface temperatur with a statistical variation within a defined range of values for every single volume element at the wall. I only need a random number in the range of [0;1]. But I can not find any function in CFX-Pre to do this. Normally I use the Expressions.
Do I have to program it in Fortran?

Thanks for your help.
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Old   June 21, 2013, 07:59
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Glenn Horrocks
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There is no CEL expression I know of for random numbers. You could either generate a chain of random numbers and get them into CFX as an interpolation function, of you could use a fortran user subroutine.
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