Boundary conditions in FireFOAM 1.7.1 for Jet Fires

hafiidz · December 7, 2010, 06:37

Hello guys,

I am a researcher trying to simulate a jet fire using fireFoam. I hope u guys can offer me any advice in how to do this. Currently I am getting some results but it is just not the correct one. The velocity I am using is very high, more than 300 m/s.

Thank you.

MaximeIST · December 7, 2010, 09:06

Hello

I think that in FireFoam, the low-Mach number approximation is used,
so with such a high velocity, FireFoam may not be able to solve your problem.
One solution can be to develop your own solver based on fireFoam but changing the treatment of the compressibility (you can see what is done in solver such as sonicFoam for instance).

Regards,
Maxime

jason_wy · December 8, 2010, 10:09

FireFOAM in 1.7.1 uses fully compressible fomulation and is able to treat compressible flow. But if it is efficient for this high speed is a different issue.

December 7, 2010, 06:37	Boundary conditions in FireFOAM 1.7.1 for Jet Fires	#1
hafiidz New Member hafiidz jaafar Join Date: Jun 2010 Posts: 4 Rep Power: 15	Hello guys, I am a researcher trying to simulate a jet fire using fireFoam. I hope u guys can offer me any advice in how to do this. Currently I am getting some results but it is just not the correct one. The velocity I am using is very high, more than 300 m/s. Thank you.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Impinging Jet Boundary Conditions	Anindya	Main CFD Forum	25	February 27, 2016 12:58
symmetry boundary conditions in cfx	lost.identity	CFX	41	May 22, 2013 07:21
[Netgen] boundary conditions and mesh exporting	vaina74	OpenFOAM Meshing & Mesh Conversion	2	May 27, 2010 09:38
Pressure boundary conditions	Lionel S.	Main CFD Forum	1	August 24, 2007 18:03
[Commercial meshers] Trimmed cell and embedded refinement mesh conversion issues	michele	OpenFOAM Meshing & Mesh Conversion	2	July 15, 2005 04:15

December 7, 2010, 09:06		#2
MaximeIST New Member Join Date: Feb 2010 Posts: 8 Rep Power: 16	Hello I think that in FireFoam, the low-Mach number approximation is used, so with such a high velocity, FireFoam may not be able to solve your problem. One solution can be to develop your own solver based on fireFoam but changing the treatment of the compressibility (you can see what is done in solver such as sonicFoam for instance). Regards, Maxime

December 8, 2010, 10:09		#3
jason_wy New Member Yi Wang Join Date: Mar 2009 Posts: 17 Rep Power: 17	FireFOAM in 1.7.1 uses fully compressible fomulation and is able to treat compressible flow. But if it is efficient for this high speed is a different issue.