how to apply UDF only for one part of the Domain?
 

Hi,
In a mixture, axisymetric, transient simulation which is performed on Domain composed of two regions(region I,II ) , I want to use UDF(DEFINE_INIT) to initialize some parameters of the fluid in one region(similar to patch).

the probelm is that i don't know how to applied the udf just to one region of the domain? how to get only the cell threads of region I?

any one could help me on this?

thanks in advance

best regards,
NAD

Find out what the zone number is of the zone that you want (in Fluent, I think it is at the 'boundary conditions' tab, see which number is shown for the relevant 'interior'). Suppose that number is 8, then change your udf into

Hi pakk,

thanks so much for your quick reply and your help.

regards,
NAD