Fluent is probably most widely used software for CFD. How come its forum is slow? I see people come and post their questions on here but no one answers. CFX is much better in this respect.

alpha

I don't think it's so slow but, anyway, to answer your question, i think there are mainly two reasons for this:

1) I don't know CFX, but Fluent is a very complex and wide code, spacing from acoustics to combustion, from porous media to multiphase flows, from compressible Large Eddy to inviscid incompressible (and maybe this is the reason to be so widely used, apart the fact that it is a finite volume unstructured solver) so it's natural that a lot of questions are about specific tasks that only few people knows very well and they are not so frequently on-line. Moreover this is "just" a cfd forum with a Fluent section and not a support site to the code.

2) The second reason is that (or at least this is what actually happens to me) the questions are very frequently repeated (how many times should we write about the y+ ?) or about simple tasks just requiring the reading of the user's manual. And there are also some other questions about basic fluid dynamic or numerics (which should be known from everyone using such a code but this is frequently not he case) and can't be answered properly because would require a full course in fluids and numerics (to make the answer readable from the reader).

The Fluent forum gets more than 10,000 messages posted every year and it is the most active forum on CFD Online. I wouldn't call it slow.

well put guys. I notice alpha isn't quick to respond!