How to generate this grid???
 

hai everyone:

http://162.105.139.102/LB5000/non-cgi/usr/6/6_5992.bmp

In gambit,how can I generate this kind of grid? I am very glad to someone who can tell me how to do.

Re: How to generate this grid???
 

If ths s a 2D problem ----

create a rectangle outer most domain. create the bigger circle. both as faces. subtract the circle frm the rectangle. then using the edge of the holloe circle, using "create face from wireframe" option again create the big circle.

now create the smaller circle and do the same procedure. u got it right !!!! try

Re: How to generate this grid???
 

I have tried it. Thanks.

But the small circle turns to polygon. Can this problem be solved?