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boundary condition in bottom intake of a dam

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Old   June 22, 2015, 14:48
Default boundary condition in bottom intake of a dam
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sina
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hi every body.
I'm working on modelling bottom intake of a dam with a gate at end. I chose RNG k-epsillon.
I have effective water head in dam 47 m.
my question is , what is the best Boundary Condition for this problem???
I defined a fluid region before inlet. I faced with this errors after run and cant stand it!
plz help me!!!

**************************************
** warning **
** open areas between blocks 1 4 **
** differ by more than 5% **
** area_diff = 5.16278E+01 % **
** try improving resolution or **
** reduce the number of blocks **
**************************************




** error opening file **
unit= 17
file= plot.%50
status= new
parameters= 1 1 1 0





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Old   August 11, 2015, 05:34
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Taimoor Ahmad
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Your problem might be with the 3D model. Try running it in MiniMagics to see any issues with the model.
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Old   January 6, 2016, 07:36
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Quote:
Originally Posted by sinatahmooresi View Post
hi every body.
I'm working on modelling bottom intake of a dam with a gate at end. I chose RNG k-epsillon.
I have effective water head in dam 47 m.
my question is , what is the best Boundary Condition for this problem???
I defined a fluid region before inlet. I faced with this errors after run and cant stand it!
plz help me!!!

**************************************
** warning **
** open areas between blocks 1 4 **
** differ by more than 5% **
** area_diff = 5.16278E+01 % **
** try improving resolution or **
** reduce the number of blocks **
**************************************




** error opening file **
unit= 17
file= plot.%50
status= new
parameters= 1 1 1 0





I've run some problem like as yours. I think the best B.C. are "static pressure"(or volume flow rate if it's specified) for inlet and "out flow" for outlet if the tail water is not important, otherwise "static pressure" is good.
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