How to calculate hydrodynamic forces and moment?

Lazarus · August 27, 2017, 07:13

Hi all,

I m working on a multiphase maneuvering problem and trying to obtain forces and moment acting on the ship with a drift angle, however, as far as i know the default 6DOF body forces obtained in Star CCM+ includes also hydrostatic effects. I just want to get only hydrodynamic component according to the ship local axis.

My question is; how to write a user define function to obtain this component?

As you see below, the forces and moment due to fluid flow are calculated with using the static pressure. Is it possible to change it to dynamic pressure? Please any one there could explain. Any reply would help me.

Thanks in advance.
Regards

Lazarus

Lazarus · August 31, 2017, 05:23

The problem is solved.

Link: Hydrodynamic force?

August 27, 2017, 07:13	How to calculate hydrodynamic forces?	#1
Lazarus New Member Can Join Date: Aug 2017 Posts: 12 Rep Power: 9	Hi all, I m working on a multiphase maneuvering problem and trying to obtain forces and moment acting on the ship with a drift angle, however, as far as i know the default 6DOF body forces obtained in Star CCM+ includes also hydrostatic effects. I just want to get only hydrodynamic component according to the ship local axis. My question is; how to write a user define function to obtain this component? As you see below, the forces and moment due to fluid flow are calculated with using the static pressure. Is it possible to change it to dynamic pressure? Please any one there could explain. Any reply would help me. Thanks in advance. Regards Lazarus Last edited by Lazarus; August 29, 2017 at 06:59. Reason: Adding an attachment

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August 31, 2017, 05:23		#2
Lazarus New Member Can Join Date: Aug 2017 Posts: 12 Rep Power: 9	The problem is solved. Link: Hydrodynamic force?