# some problem about "define boudary"

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 October 3, 2005, 05:29 some problem about "define boudary" #1 ztdep Guest   Posts: n/a Sponsored Links I simulate "2D natural convection problem in a concentric cylinder", but how to select the inner and the outwall of the concentric cylinder, need i selet it cell by cell . regards

 October 3, 2005, 06:34 Re: some problem about "define boudary" #2 William Blake Guest   Posts: n/a You can use tho cell layers at first and the command bfin to define the inner and outer wall, and delete the second layer and some of the boundaries later. Another option is to create shells for the whole model using "live surf create" and change the cell types of these shell according to the boundaries. Now put one cell type into the cell set, do a cplot and a "zoom off \$ repl". Now you can use "bzon 2 all" to assign region 2 to those cells.

 October 3, 2005, 10:56 Re: some problem about "define boudary" #3 ztdep Guest   Posts: n/a thank you very much , you are really a genius, but i am a new in the star-cd . can you give me some detail suggestion. regards

 October 4, 2005, 16:29 Re: some problem about "define boudary" #4 William Blake Guest   Posts: n/a Try to understand the following commands vc3d 0 1 10 0 1 10 0 0.1 1 cset,all cplot view 1 1 1 zoom,off \$replot live surf create cset,all cplot ctab 10 shell 3 rp6 1 ,, 1 cset news type 4 cplo vset news edge ctype 10 cfin modi 26 cplot cset dele type 10 cplot ctype 11 cfin modi 159 cplot cset dele type 11 cplo cset subs gran -1 2 0.95 2 cplo ctype 12 cmod cset cplot cset news type 4 cplot cset subs gran -1 2 -1 0.05 cplot ctype 13 cmod cset cset news type 4 cplot cset subs gran -1 0.5 cplo ctype 14 cmod cset cplot cset news type 4 cplot ctype 15 cmod cset cplot cset,all cplot cset news type 10 cplo zoom,off \$replot bzon 1 all cset news type 11 cplot zoom,off \$replot bzon 2 all cset news type 12 cplot zoom,off \$replot bzon 3 all cset news type 13 cplot zoom,off \$replot bzon 4 all cset news type 14 cplot zoom,off \$replot bzon 5 all cset news type 15 cplot zoom,off \$replot bzon 6 all

 October 11, 2005, 06:57 Re: some problem about "define boudary" #5 bv Guest   Posts: n/a Hi, I think there is one tutorial explaning this. please check once again.

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