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-   -   Cylindrical obstacles in cartesion coordinates (http://www.cfd-online.com/Forums/phoenics/52153-cylindrical-obstacles-cartesion-coordinates.html)

Brajesh Tripathi February 17, 2007 08:39

Cylindrical obstacles in cartesion coordinates
 
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?

amv February 19, 2007 06:19

Re: Cylindrical obstacles in cartesion coordinates
 
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.

Brajesh Tripathi February 21, 2007 14:05

Re: Cylindrical obstacles in cartesion coordinates
 
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

PattiMichelle July 11, 2007 19:55

Re: Cylindrical obstacles in cartesion coordinates
 
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

Brajesh Tripathi July 16, 2007 00:23

Re: Cylindrical obstacles in cartesion coordinates
 
Thanks P

I think this might work. and now I got exact idea.

Thanks again


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