Need help with meshing
 

Hi, I've been working on a project involving a 3D model of a room with two inlets and two outlets. In the end I want to track particle movements and concentrations of different gases. I meshed each imprinted inlet and outlet and then I meshed the body as a whole.

My question is, how can I create a finer mesh where the velocity is high and a coarse mesh where the velocity is low?

I want to have my solution converge and right now it does not. I'm also using the student version which reaches a maximum of 512000 cells, so I want finer mesh only where it is necessary.

In the picture you can see where the velocity is high and where it is low.
http://imgur.com/vAHniNA

not sure if the picture worked so here is the link. http://imgur.com/vAHniNA
Thanks.

Is there anyone that can help me? I would like to mesh the bottom halfof the room with a fine mesh and the upper half with a coarse mesh. Does anyone know how to do this?

set different sizing and you are done.

can you be more specific?

I would like to have a min element size of about 0.05 and a max of about 0.1.

Say if you want to refine only bottom half of the room, draw a cube of its dimensions in the design modeler. In ansys meshing,use sizing function -> body of influence- > select the cube -> give the element size for refinement.

Ok, thanks for your response.