Two urgent questions

Lee

Dear all,

I have two questions which need your help. One is about the pro*am, the other is about how to model a moving slide valve which is used to cover a round pipe.

The first question is that I want to use pro*am to generate one model in which some parts are consisted of finer meshes and some parts are consisted of coarser meshes, but the changes should be gradual. However, I can't find some command or the corresponding GUI in pro*am to generate gradually variable meshes.(In prostar, I found some commands that provide fill ratio,ie., cgenerate). I want to know whether and how I can change the meshes density gradually.

The second question is that I want to generate a model which consists of a round pipe and a slide valve that has a hole whose diameter is the same as the pipe diameter. The slider vale moves to close or open the pipe. Before and after the slide valve, the pressure values in the pipe are different. I know I should use the moving meshes to realize the above goal, but because of the round shape, it is very hard for me to do it. How can I create the moving meshes to let the valve close and open the pipe? I am very appriciated that if you can provide a strategy to solve that problem!

Thank you very much for your help!

With best wishes, Lee