CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Solving the transient condition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 15, 2012, 06:08
Default Solving the transient condition
  #1
New Member
 
ehsan
Join Date: Apr 2012
Posts: 6
Rep Power: 5
ehsan1986 is on a distinguished road
Hi everybody;
I`m working on gas flow between engine cylinder and piston.
I have assumed Combustion chamber pressure as a pressure inlet.
Now,question is,how can I Definition the inlet as a transient?
ehsan1986 is offline   Reply With Quote

Old   October 15, 2012, 12:20
Default
  #2
Senior Member
 
Join Date: Mar 2011
Location: Germany
Posts: 414
Rep Power: 11
cfd seeker is on a distinguished road
I am not an expert in this but I guess you have to use a UDF for the transient inlet conditions
cfd seeker is offline   Reply With Quote

Old   October 15, 2012, 16:03
Default
  #3
Member
 
sadjad.s's Avatar
 
sadjad
Join Date: Jan 2012
Posts: 60
Rep Power: 5
sadjad.s is on a distinguished road
Send a message via Yahoo to sadjad.s
hi mate,
if you want your inlet to change with time, you need to write a udf, which is DEFINE_PROFILE macro.
sadjad.s is offline   Reply With Quote

Old   October 17, 2012, 12:24
Default
  #4
Member
 
NormalVector's Avatar
 
NormalVector
Join Date: Oct 2010
Posts: 72
Rep Power: 6
NormalVector is on a distinguished road
You can also define a profile for a transient BC. A profile is essentially a BC Value vs. Time set of data. Fluent linearly interpolates values for flow times that occur in between Time data points you supply.
NormalVector is offline   Reply With Quote

Reply

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
AMI speed performance danny123 OpenFOAM 19 October 24, 2012 07:44
icoLagrangianFoam OF1.6 myNewParticleSolver heavy_user OpenFOAM 16 February 11, 2012 06:15
Computational time sunnysun OpenFOAM Running, Solving & CFD 5 March 16, 2009 04:32
SimpleFoam k and epsilon bounded nedved OpenFOAM Running, Solving & CFD 1 November 25, 2008 21:21
Modeling in micron scale using icoFoam m9819348 OpenFOAM Running, Solving & CFD 7 October 27, 2007 00:36


All times are GMT -4. The time now is 16:55.