Internal sink source boundary condition - how to do?

Q.Cao · March 11, 2013, 06:47

Hello Fomers!

I got a problem with the BC, as the follwing graph, for some reason there is a surface sink source in a flowfield, this means the both spieces A and B disappear on the single middle surface. Like they rush into a blackhole.

How can i set the bondary condition on that surface?

I tried:
1. topoSet--> to choose the middle surface
2. blockMesh: leftside { type cyclic; faces ( ); neighbourPatch rightside; } ...--> to give the patch.
3. in Terminal: createBaffles middleSurface '(leftside rightside)' -overwrite --> to split the middle surface into 2 surfaces: "leftside" and "rightside".

But i got the problem with the "cyclic" boundary condition,

it seems like i can not use the "cyclic" BC for a sink source. But i really need to split that middle surface into 2, because i need 2 "outlet" for the both speices.

What can i do with that kind of BC

case.jpg

Thanks,
Q. Cao

nuttita · July 7, 2018, 21:24

Did you solve this problem?

March 11, 2013, 06:47	Internal sink source boundary condition - how to do?	#1
Q.Cao New Member Qing, Cao Join Date: Nov 2012 Posts: 6 Rep Power: 14	Hello Fomers! I got a problem with the BC, as the follwing graph, for some reason there is a surface sink source in a flowfield, this means the both spieces A and B disappear on the single middle surface. Like they rush into a blackhole. How can i set the bondary condition on that surface? I tried: 1. topoSet--> to choose the middle surface 2. blockMesh: leftside { type cyclic; faces ( ); neighbourPatch rightside; } ...--> to give the patch. 3. in Terminal: createBaffles middleSurface '(leftside rightside)' -overwrite --> to split the middle surface into 2 surfaces: "leftside" and "rightside". But i got the problem with the "cyclic" boundary condition, it seems like i can not use the "cyclic" BC for a sink source. But i really need to split that middle surface into 2, because i need 2 "outlet" for the both speices. What can i do with that kind of BC case.jpg Thanks, Q. Cao

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July 7, 2018, 21:24		#2
nuttita New Member Nuttita Pophet Join Date: Oct 2016 Location: Mississippi, USA Posts: 10 Rep Power: 10	Did you solve this problem?