CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Programming & Development

rhoReactinBuoyantFoam - Buoyant Mixing of two gases

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 13, 2014, 13:09
Default rhoReactinBuoyantFoam - Buoyant Mixing of two gases
  #1
New Member
 
Krishna
Join Date: Jun 2012
Posts: 28
Blog Entries: 1
Rep Power: 5
rkc.cfd is on a distinguished road
Hi,

I am trying to implement mixing of buoyant turbulent helium jet with ambient air. I have taken rhoReactingBuoyantFoam and dropped the eEeqn as I am doing an iso Thermal jet. I switched of both chemistry and combustion.

The velocity is dissipating immediately after the entrance and its quite strange and dont know to address this issue.
velocity.png

My Thermo settings are

Code:
thermoType
{
    type            heRhoThermo;
    mixture         multiComponentMixture;
    transport       const;
    thermo          hConst;
    energy          sensibleInternalEnergy;
    equationOfState incompressiblePerfectGas;
    specie          specie;
}
My LES settings are

Code:
LESModel        Smagorinsky;
turbulence      on;
printCoeffs     on;
delta           cubeRootVol;
cubeRootVolCoeffs
{
    deltaCoeff      1;
}
  SmagorinskyCoeffs
    {
      filter simple;
      ce 1.048;
    }
The domain I am simulating is simple cylinder connected to the a box.
domain.png
The mesh is coarse to check the running of the simulation at 1.7M cells.
mesh.png
Attached are also the boundary conditions and schemes used.
0.tar.gz

system.tar.gz

Hope somebody can provide some suggestions to find the issue of the velocity dissipating immediately after the inlet.

Cheers
rkc.cfd is offline   Reply With Quote

Reply

Tags
mixing gases, rhoreactinbuoyantfoam

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
2D simulation for mixing two non-reacting gases arun.mechie FLUENT 16 August 16, 2015 11:26
2 gases mixing flow pipin FLUENT 0 April 15, 2011 11:14
Mixing of two non-reacting gases vishyaroon Main CFD Forum 2 August 6, 2009 09:26
solve the mixing of gases Prashant FLUENT 4 May 21, 2008 00:51
Floworks: Mixing and thermal analysis of two gases Jay Nelson Main CFD Forum 0 June 14, 2005 18:29


All times are GMT -4. The time now is 08:19.