CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

how to model varying gravity in Star CCM+

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   November 15, 2009, 10:07
Post modeling of slosh analysis with time varying accel/decell
New Member
Join Date: Nov 2009
Posts: 1
Rep Power: 0
mohan makana is on a distinguished road
I am trying to model some sloshing analysis in a fuel tank of an marine engine. I want to give accel/decel which is varying with time.
In reference values i was able to give constant accel/decel but not varying. I will be thankful if some one can provide me solution.

Last edited by mohan makana; November 15, 2009 at 10:27. Reason: delete
mohan makana is offline   Reply With Quote

Old   November 25, 2009, 01:06
Senior Member
Join Date: Mar 2009
Posts: 357
Rep Power: 13
ping is on a distinguished road
Two suggestions:

1. very easy method - simply type an equation into the gravity setting for X (ie replace 0 with say sin($Time * 3.2) or whatever.

2. easy method - create a field function called say GravX, and set its value to the required equation -
eg sin($Time * 3.2). Then simply type this field function name into the gravity setting for X (ie replace 0 with $GravX).

Even thought lots of menus dont have a field function dropdown and only constant settings, you can still type in a field function name or equation - very handy and not well documented!

3. harder method - do a java macro and solve via the macro changing the gravity constants every timestep.
ping is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to convert model from Gambit to Star CD ? Jimmy Siemens 4 September 16, 2008 10:07
can we model incylinder flows STAR CCM+ farhath Siemens 2 July 8, 2008 15:00
how to make animation in star ccm *NM* raziftech Siemens 3 October 17, 2007 02:35
STAR, Fluent, CFX and conj. heat transfer star-user Main CFD Forum 8 January 21, 2003 00:07
Radiation in STAR fluent user Siemens 4 October 11, 2001 16:12

All times are GMT -4. The time now is 23:05.