Learning Forum

[sreekesh]

Hello, I'm trying to write a UDF for a modified Random Walk Model for particle tracking, which I plan to compare to the standard Random Walk model available in FLUENT. Could you please tell me which macro files I need to use to change the Random Walk model? Thank you in advance.

[Rob]

At a guess you'd turn the stochastic tries off and need to code up a DPM_SOURCE UDF to mimic the effect. Just remember to release a lot more parcels to replicate the effect of the tries.

[sreekesh]

Thank you Rob. Let me check DPM_SOURCE. The particle number flow rate is passing as an argument. I am looking, is there any separate macro for calculating the stochastic tracking variables

[Rob]

Pass, the header files might have something, but as you're writing your own you may need to refer to the turbulence values.