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

Defining pressure field function

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 12, 2013, 10:41
Thumbs up Defining pressure field function
New Member
Anirudh Ramachandran
Join Date: Jun 2011
Location: Raleigh, North Carolina
Posts: 2
Rep Power: 0
aniramzee is on a distinguished road
Hey everyone,
I'm trying to simulate water jet break up under the influence of air using VOF. I've simulated it as one region, and the pressure increases from top to bottom under the influence of gravity, so the jet isn't propagating once it leaves the orifice as it's going from a point of low pressure to a point of high pressure.
I was wondering if I should consider modeling it as 2 regions with an interface at the boundary, or if I should define the pressure as a field function.
If field function is a better option, then could someone please help me out with defining it?
It's logic would be:
(101325 Pa)+(density of water*9.81*($$Position[2]) up to the distance of the water tank and orifice length.
Beyond this point, the pressure becomes atmospheric pressure again, and increases as
(101325 Pa)+(density of air*9.81*($$Position[2]) up to the end of the air column.
Any help would be highly appreciated.
aniramzee is offline   Reply With Quote


field function, jet breakup, multiphase flows, vof

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to get the velocity field from the pressure field Hermano Main CFD Forum 2 November 29, 2011 08:32
mean, variance and covariance statistics of any field function on any part. Subhadeep STAR-CCM+ 8 February 18, 2010 17:19
Modifying pressure field in CFX akultane CFX 2 January 13, 2010 14:42
custom pressure field at the faces Souviktor FLUENT 0 April 3, 2009 08:09
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 05:13

All times are GMT -4. The time now is 12:08.