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-   -   Boundary Conditions (http://www.cfd-online.com/Forums/fluent/41113-boundary-conditions.html)

James Pattison May 25, 2006 03:26

Boundary Conditions
 
Hi

I'm trying to setup a UDF in Fluent 6 that changes the boundary type depending on the incident particle condition. I'm looking at particle velocities through a supersonic nozzle using Disrete Phase Modelling. I want to set a boundary condition such that the incident particles are reflected if their velocity is below a threshold velocity, or trapped if they exceed it. Is this possible?

Thanks


HS May 29, 2006 10:17

Re: Boundary Conditions
 
Yes, this is possible, and should not be that hard to do either. You will need to write a UDF and use as your DPM boundary condition at the wall. The examples available in the UDF Manual will give you a great hint of how to write it.

Good luck!

/Henrik


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