overset mesh - drag

JohnAB · September 12, 2013, 13:23

Hello,

I have a moving "boat" (submersion, i.e. z coordinate, is fixed because my boat is towed by another structure), in a constant speed translation (let's say 1m/s along x-axis) and I would like to get the drag report.
I have read how to do it with a 6 dof body (like in the tutorials and the help), but since my boat has no degree of freedom except the translation along x, and the fact that it is moving using overset mesh, I am not really sure how to get the correct drag (not sure either about the reference frame), and then maybe the "lift".

Should I just create a new force report, pressure, along x-axis, using ref density of water, lab ref frame, and select my boat as the part ?

Thanks for you help!

lava12005 · September 25, 2013, 05:31

Do you use the 'boat' as a DFBI body?

Regardless of that, yes you can use the force report as per normal.

September 12, 2013, 13:23	overset mesh - drag	#1
JohnAB Member Join Date: Nov 2012 Posts: 74 Rep Power: 13	Hello, I have a moving "boat" (submersion, i.e. z coordinate, is fixed because my boat is towed by another structure), in a constant speed translation (let's say 1m/s along x-axis) and I would like to get the drag report. I have read how to do it with a 6 dof body (like in the tutorials and the help), but since my boat has no degree of freedom except the translation along x, and the fact that it is moving using overset mesh, I am not really sure how to get the correct drag (not sure either about the reference frame), and then maybe the "lift". Should I just create a new force report, pressure, along x-axis, using ref density of water, lab ref frame, and select my boat as the part ? Thanks for you help!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[snappyHexMesh] Number of cells in mesh don't match with size of cellLevel	colinB	OpenFOAM Meshing & Mesh Conversion	14	December 12, 2018 08:07
Mesh motion with Translation & Rotation	Doginal	CFX	2	January 12, 2014 06:21
How to mesh for drag estimation .	jeevan kumar	CFX	0	March 3, 2008 05:35
basic of mesh refinement	arya	CFX	4	June 19, 2007 12:21
Icemcfd 11: Loss of mesh from surface mesh option?	Joe	CFX	2	March 26, 2007 18:10

September 25, 2013, 05:31		#2
lava12005 Senior Member KHB Join Date: Aug 2010 Location: Singapore Posts: 118 Rep Power: 15	Do you use the 'boat' as a DFBI body? Regardless of that, yes you can use the force report as per normal.