Hydrostatic Pressure for a submerged body

Seervan · June 8, 2017, 06:33

Greetings
I have a rather simple question. I want to model a submerged body moving with speed of V in a depth of say 10 meters and want to neglect the free surface. Thus I don't want to activate the VOF Wave model. My question is: How to define hydrostatic/hydrodynamic pressure specially at boundaries?
I rather say I want to it via a field function but am not very familiar with the syntax. Thus I don't know how to add position Z in the calculation.

Best Regards

ping · June 15, 2017, 22:39

by far the easiest way is to activate vof waves then define a flat wave but set the wave surface to be outside your fluid region so there will be no free surface created nor solved
then you can still use the inbuilt field functions on the boundary
otherwise create field functions involving gravity and height which if z is vertical is $$Position[2]

Seervan · June 17, 2017, 06:11

Thanks for the reply
Yes in fact for such situations I have exactly done the method you said.
So all I have to do is to add the position of Z in the form you mentioned. Thanks for the hint.

June 8, 2017, 06:33	Hydrostatic Pressure for a submerged body	#1
Seervan Member Soroush Kargar Join Date: Apr 2017 Posts: 45 Rep Power: 9	Greetings I have a rather simple question. I want to model a submerged body moving with speed of V in a depth of say 10 meters and want to neglect the free surface. Thus I don't want to activate the VOF Wave model. My question is: How to define hydrostatic/hydrodynamic pressure specially at boundaries? I rather say I want to it via a field function but am not very familiar with the syntax. Thus I don't know how to add position Z in the calculation. Best Regards

June 15, 2017, 22:39		#2
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	by far the easiest way is to activate vof waves then define a flat wave but set the wave surface to be outside your fluid region so there will be no free surface created nor solved then you can still use the inbuilt field functions on the boundary otherwise create field functions involving gravity and height which if z is vertical is $$Position[2] Seervan likes this.

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June 17, 2017, 06:11		#3
Seervan Member Soroush Kargar Join Date: Apr 2017 Posts: 45 Rep Power: 9	Thanks for the reply Yes in fact for such situations I have exactly done the method you said. So all I have to do is to add the position of Z in the form you mentioned. Thanks for the hint.