# velocity blocking

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 October 22, 2003, 04:40 velocity blocking #1 F.K. Guest   Posts: n/a Hi all, is it possible to block the velocity components u,v for a predefined cell id so that only w exists?? thx

 October 22, 2003, 05:16 Re: velocity blocking #2 ulf Guest   Posts: n/a Check the usersubroutine "sormom.f" for more info.

 October 22, 2003, 05:24 Re: velocity blocking #3 F.K. Guest   Posts: n/a the usersubroutine sormom.f can't be used for velocity blocking!!!!

 October 22, 2003, 09:12 Re: velocity blocking #4 ulf Guest   Posts: n/a That depends on what you mean with blocking. I assumed you wanted 0-velocity for some cells.

 October 22, 2003, 11:01 Re: velocity blocking #5 steve Guest   Posts: n/a Perhaps you could turn that cell in question to porous and define the coeficients such that there is no resistance in the w direction and infinite resistance in the other 2 directions?

 October 23, 2003, 05:38 Re: velocity blocking #6 F.K. Guest   Posts: n/a Yes ,thank you for your help. I have adjusted the values so that nearly no resitance appears. I've tried the some with sormon.f in combination with sorent.f but this leads to strange results. So I think it is not possible to define a flow-equalizer(u,v blocked, w no restriction) with the subroutines.

 October 23, 2003, 05:50 Re: velocity blocking #7 vladimir krejci Guest   Posts: n/a I do not know what is your problem about but you can set arbitrary velocity at any cell using the sormom.f subroutine just write if (ictid.eq.prostar_cell_type_number_where_the_subro utine_should_apply) then s1u=velocity_you_like*great s2u=great and similarly for the rest endif instead of ictid you can use ip or something like that for cell number using this procedure may appear unstable regards

 October 23, 2003, 17:32 Re: velocity blocking #8 steve Guest   Posts: n/a Why even bother with user subroutines? Can't you just use prostar to define which cells are porous and adjust the porous material properties accordingly?

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