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Old   October 22, 2003, 04:40
Default velocity blocking
  #1
F.K.
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Hi all,

is it possible to block the velocity components u,v for a predefined cell id so that only w exists??

thx
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Old   October 22, 2003, 05:16
Default Re: velocity blocking
  #2
ulf
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Check the usersubroutine "sormom.f" for more info.
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Old   October 22, 2003, 05:24
Default Re: velocity blocking
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F.K.
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the usersubroutine sormom.f can't be used for velocity blocking!!!!
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Old   October 22, 2003, 09:12
Default Re: velocity blocking
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ulf
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That depends on what you mean with blocking. I assumed you wanted 0-velocity for some cells.
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Old   October 22, 2003, 11:01
Default Re: velocity blocking
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steve
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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?
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Old   October 23, 2003, 05:38
Default Re: velocity blocking
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F.K.
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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.

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Old   October 23, 2003, 05:50
Default Re: velocity blocking
  #7
vladimir krejci
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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
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Old   October 23, 2003, 17:32
Default Re: velocity blocking
  #8
steve
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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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