How to separate hydrostatic force from hydrodynamic force

rjm1982 · February 21, 2018, 07:26

Hello,

I have a submerged hydrofoil in an open channel flow and I am interested in getting the lift force acting on the foil. However when I use the lift force report option the force seem far too large and i think it may be due to a hydrostatic effect. I would like to therefore output the hydrostatic and hydrodynamic forces separately - does anyone know how to do this? I can't find a way. I am willing to use a UDF if necessary but haven't been able to work out how yet.

Thanks in advance for any advice,

Richard

CFD-fellow · February 25, 2018, 23:03

Hi
How do you know it is far too large? Do you have experimental results?
If your scale and other settings are OK, you can easily calculate and subtract the buoyancy force from your total lift or do the simulation with gravity being turned off.

February 21, 2018, 07:26	How to separate hydrostatic force from hydrodynamic force	#1
rjm1982 New Member Join Date: Nov 2017 Posts: 15 Rep Power: 8	Hello, I have a submerged hydrofoil in an open channel flow and I am interested in getting the lift force acting on the foil. However when I use the lift force report option the force seem far too large and i think it may be due to a hydrostatic effect. I would like to therefore output the hydrostatic and hydrodynamic forces separately - does anyone know how to do this? I can't find a way. I am willing to use a UDF if necessary but haven't been able to work out how yet. Thanks in advance for any advice, Richard

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Hydrodynamic force?	arun7328	STAR-CCM+	24	July 25, 2020 04:04
ActuatorDiskExplicitForce in OF2.1. Help	be_inspired	OpenFOAM Programming & Development	10	September 14, 2018 11:12
6DOF solver (buoyancy and hydrostatic force)	ZacHillAdl	Fluent UDF and Scheme Programming	2	March 27, 2017 15:20
to separate pressure force and viscous force using udf	ignayars	Fluent UDF and Scheme Programming	1	October 19, 2014 07:26
Force can not converge	colopolo	CFX	13	October 4, 2011 22:03

February 25, 2018, 23:03		#2
CFD-fellow Senior Member Behrooz Jamshidi Join Date: Apr 2013 Posts: 110 Rep Power: 13	Hi How do you know it is far too large? Do you have experimental results? If your scale and other settings are OK, you can easily calculate and subtract the buoyancy force from your total lift or do the simulation with gravity being turned off.