dear all,

if i want to update the particle velocity after every time, how do I do it ?

hoping for a reply.

best regards.

Maybe you should use "UDF"(User-defined) regards

hi, thank you for your reply. yes, i understand that i need to use UDF. but can you show me with an expample. regards.

There is a UDF Manual in FLUENT Documentation. If you do not have it, you can find it in this link: http://www.engres.odu.edu/Applicatio...df/udf/pdf.htm

I hope it can help you.

dear sir,

thank you very much. I downloaded it. Ccan you tell me which UDf example are you referring at ?

thanks and regards.

There is a FLUENT 6.2 Tutorial Guide in this link: http://www.engres.odu.edu/Applicatio...g/main_pre.htm The 4th topic, Modeling Unsteady Compressible Flow ,involve something about using UDF. However,if you want to know that how to write UDF functions, you must read the whole FLUENT 6.3 UDF Manual.

thanks, i appreciate your help. but unforttunately you were not able to understand my query..