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January 21, 2007, 19:48
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Hi,
I am trying to figure out
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#1 |
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New Member
Shawn Pfeil
Join Date: Mar 2009
Posts: 11
Rep Power: 17  |
Hi,
I am trying to figure out what the appropriate boundary conditions are for a diffusive tracer at the outlet of a t mixer. I am using twoLiquidMixingFoam with gamma as the tracer. I know from Fick's law that I want zero gradient boundary conditions at the walls, and fixed value bondaries are fine at the inlet. However, neither of these make physical sense at the outlet. Is their a way to let the value float at this point? Shawn |
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January 23, 2007, 04:07
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The "normal" way would be zero
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#2 |
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Member
Ola Widlund
Join Date: Mar 2009
Location: Sweden
Posts: 87
Rep Power: 17 |
The "normal" way would be zero gradient. The tracer is just convected out of the domain from upstream, anyway (upwind discretisation for the convective flux).
/Ola |
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