Dear friends,

How can we write a User defined function for the boundary condition specifying that the vertical component of velocity is zero and the temperature is T_infinity, i.e 293K in my problem. I would be very thankful if anyone can clearly give me the C-programme for writing the UDF.

Thanks.

sridhar.

Use a profile function - some examples are in the udf manual

actually do you need a udf for this??

Hi Greg, thanks for your responce. Do you think is there is any other way to represent the boundary conditions which I am intrested in applying?? if so please help me. Actually I am working on "bouyancy driven flow over flat vertical plate", If you want clear description of the problem, I appreciate you very much if you could please refer to the messege which I posted on June 25th with the title " natural convection flow over flat vertical plate". actually I am trying to set the above boundary conditions to the boundary which is located opposite to the vertical plate. I tried applying pressure inlet conditions to it, but I am not getting the velocity boundary layer at the wall.

I sincerly request if Anyone who is familiar with this topic can please help me. Thanks