# Cylindrical obstacles in cartesion coordinates

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 February 17, 2007, 07:39 Cylindrical obstacles in cartesion coordinates #1 Brajesh Tripathi Guest   Posts: n/a I was trying to create a cylindrical obstacles in cartesion cordinates system and i got the cylinder.dat file. i used this file in the simple room geometry (3x3x3) and finally i got good results. Now i want to know how gridding and other variables are treated for cylindrical obstacles in cartesion coordinate systems. Please help me?

 February 19, 2007, 05:19 Re: Cylindrical obstacles in cartesion coordinates #2 amv Guest   Posts: n/a these things are not given in manual in details. of course it identifies the cells with solid and liquid/gas and then sets zero and non-zero velocities respectively. At the interface cells, it uses PARSOL but formulaiton of PARSOL isnt given.

 February 21, 2007, 13:05 Re: Cylindrical obstacles in cartesion coordinates #3 Brajesh Tripathi Guest   Posts: n/a Thanks amv, but still things are not clear because as i know we can't use cylinder in cartesion coordinates without multiblocking the grid feature. Can u please tell me that what are the input paramters for cylinder for my problem. thanks

 July 11, 2007, 19:55 Re: Cylindrical obstacles in cartesion coordinates #4 PattiMichelle Guest   Posts: n/a The idea is to turn on PARSOL - that way partially blocked cells (intersection of rectangular cells with curved surfaces) is approximated by a *partially* blocked cell. It often works pretty well if the grid size is small. The other option is to use a 3rd party grid-generation program and use BFC's. Patti

 July 16, 2007, 00:23 Re: Cylindrical obstacles in cartesion coordinates #5 Brajesh Tripathi Guest   Posts: n/a Thanks P I think this might work. and now I got exact idea. Thanks again