CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Boundary conditions in Fluent

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

LinkBack Thread Tools Display Modes
Old   January 7, 2003, 15:21
Default Boundary conditions in Fluent
Ankan Kumar
Posts: n/a

I am new to Fluent. Can anybody tell me how do I put a FULLY DEVELOPED inlet boundary condition for pipe flow in Fluent? The velocity inlet conditon gives me plug flow which is not what I want.

Thanks Ankan
  Reply With Quote

Old   January 7, 2003, 22:50
Default Re: Boundary conditions in Fluent
Posts: n/a

All we can do such a thing is that we have to customize the boundary condition via User Defined Function(called UDF) . Or, how about extend the inlet to be fully developed flow?.

I mean , we make the inlet region(called entrance region, or inlet length , enctrance length) This length is given by Boussineq or Nikuradse in laminar flow . Latzko in turbulence. When we make this length ,Fully developed flow is got automatically. This way is the most easy way I guess.

  Reply With Quote

Old   January 10, 2003, 21:08
Default Re: Boundary conditions in Fluent
Posts: n/a
For your help further just look UDF manul 1st-3rd chapters and you have a clear idea about your problem.


  Reply With Quote

Old   March 20, 2016, 12:13
Muhammad Furqan Ali
Join Date: Oct 2014
Location: beijing
Posts: 36
Rep Power: 4
furqanrk is on a distinguished road
Send a message via Skype™ to furqanrk
Originally Posted by Alamgir
For your help further just look UDF manul 1st-3rd chapters and you have a clear idea about your problem.



Dear expert.. I have to use Superficial gas velocity 0.0016 m/s. But In fluent we have to put Velocity Magnitude at VELOCITY INLET boundary conditions.( INLET VELOCITY) How can I calculate INLET GAS VELOCITY form superficial gas velocity??? ( Reactor dimensions are 20*5*50 cm W*D*L and inlet dimensions are 2.4*1.2 L*D )
furqanrk 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
Boundary conditions in Fluent. Novice FLUENT 5 March 20, 2016 12:10
non reflective boundary conditions for incompresible flow Pascal_doran OpenFOAM Programming & Development 16 August 25, 2015 05:35
Implementation of boundary conditions for FVM Tom Main CFD Forum 7 August 26, 2014 05:58
asking for Boundary condition in FLUENT Destry FLUENT 0 July 27, 2010 00:55
Import Fluent Mesh and Boundary Conditions BTU-RoRo CFX 3 July 23, 2010 14:20

All times are GMT -4. The time now is 04:37.