Normal distance from a complex shaped wall - initial conditions

prashantvalluri · September 20, 2017, 09:08

Dear Forum - I have a complex shaped wall. And I need to set an initial condition on volume fraction only upto a certain distance normal to the wall. This height is (one of my) input parameters and I dont really want to spend time recreating mesh-domains.

Is there a simpler way I can use via CEL or functions wherein I calculate the describe either
a) a part of the wall distance or
b) simply indicate the number of cells (elements) normal to the walls.

Any help will be most appreciated.

Prash

urosgrivc · September 20, 2017, 10:00

I can see this working with:
something like;

If(Wall Distance>2[mm],1,0)

this would give you volume fraction of 1 up to 2mm away from the wall.
Althoug this does have a problem => this wil than be true for all the wals you have if this is not a problem than this should work
but if you have walls where you dont want your fluid than I am not sure what to do exactly.
locator is all the wals majbe there is a waj to select

prashantvalluri · September 20, 2017, 10:55

Thanks. So, "wall distance" can be used directly as a function?

Prash

urosgrivc · September 20, 2017, 14:26

Yes Wall Distance is one of the wariables so this should work direktly in an expression

September 20, 2017, 09:08	Normal distance from a complex shaped wall - initial conditions	#1
prashantvalluri New Member Prash Valluri Join Date: Sep 2017 Posts: 2 Rep Power: 0	Dear Forum - I have a complex shaped wall. And I need to set an initial condition on volume fraction only upto a certain distance normal to the wall. This height is (one of my) input parameters and I dont really want to spend time recreating mesh-domains. Is there a simpler way I can use via CEL or functions wherein I calculate the describe either a) a part of the wall distance or b) simply indicate the number of cells (elements) normal to the walls. Any help will be most appreciated. Prash

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September 20, 2017, 10:00		#2
urosgrivc Senior Member urosgrivc Join Date: Dec 2015 Location: Slovenija Posts: 365 Rep Power: 12	I can see this working with: something like; If(Wall Distance>2[mm],1,0) this would give you volume fraction of 1 up to 2mm away from the wall. Althoug this does have a problem => this wil than be true for all the wals you have if this is not a problem than this should work but if you have walls where you dont want your fluid than I am not sure what to do exactly. locator is all the wals majbe there is a waj to select

September 20, 2017, 10:55		#3
prashantvalluri New Member Prash Valluri Join Date: Sep 2017 Posts: 2 Rep Power: 0	Thanks. So, "wall distance" can be used directly as a function? Prash

September 20, 2017, 14:26		#4
urosgrivc Senior Member urosgrivc Join Date: Dec 2015 Location: Slovenija Posts: 365 Rep Power: 12	Yes Wall Distance is one of the wariables so this should work direktly in an expression