Frees surface and sloshing (please help me ASAP)

hossein_sml · September 15, 2015, 15:30

Hi,
I am trying to simulating sloshing problem in marine oil tankers. (2D)

I have created a 2D cube which rotate about 20 degrees. center of rotation is middle of lower side.
+ I have used hexa mesh ( witch ICEM CFD)
+ laminar flow
+ hemougen
+ Free surface : 0.073 N/m

Unfortunately when the cube rotates, free surface of water inside gets severe slope, which is illogical.

How can I fix it?
What is the problem?

Please Help me.

ghorrocks · September 15, 2015, 19:50

Please show some images of what you are getting, your mesh and CCL.

Also - do not model surface tension unless surface tension is important. It is a very expensive model to include.

hossein_sml · January 3, 2016, 06:58

Quote:

Originally Posted by ghorrocks

Please show some images of what you are getting, your mesh and CCL.

Also - do not model surface tension unless surface tension is important. It is a very expensive model to include.

Dear
I have tried a lot but can not solve the problem, yet.
I have attached images in new post.

http://www.cfd-online.com/Forums/cfx...e-surface.html

I really need guidance

September 15, 2015, 15:30	Frees surface and sloshing (please help me ASAP)	#1
hossein_sml New Member hossein Join Date: May 2012 Posts: 28 Rep Power: 14	Hi, I am trying to simulating sloshing problem in marine oil tankers. (2D) I have created a 2D cube which rotate about 20 degrees. center of rotation is middle of lower side. + I have used hexa mesh ( witch ICEM CFD) + laminar flow + hemougen + Free surface : 0.073 N/m Unfortunately when the cube rotates, free surface of water inside gets severe slope, which is illogical. How can I fix it? What is the problem? Please Help me.

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September 15, 2015, 19:50		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Please show some images of what you are getting, your mesh and CCL. Also - do not model surface tension unless surface tension is important. It is a very expensive model to include.