CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

combustion natural gas burner

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 8, 2001, 12:35
Default combustion natural gas burner
Jorge Chacón Hernandez
Posts: n/a

I´m working in design the a low NOx natural gas burner with Fluent.

I'm investigating numerically flow characteristics, heat transfer and combustion process in a fired 2 MW boiler furnace. Now,I encounter some problems. The convergence is very difficult.

Anybody has some advices for me? Thanks,

  Reply With Quote

Old   August 10, 2001, 03:19
Default Re: combustion natural gas burner
Jin-Wook LEE
Posts: n/a
In general, the convergence is one of major problem for CFD simulation, especially for combustion, multri-phase and so on. Following tips might be helpful to you.

1) Mesh skewness affects convergence behavior for most flow simulation, especially for combustion simulation.

2) Under-relaxation parameters frequently affect convergence behavior. For example, Fluent's default setting for species under-relaxation is 1.0. This value is not good for most combustion simulation. Set them as lower value(e.g., 0.8~0.9 or ...).

3) Enthalpy is very difficult to converge. Check your mesh skewness and adjust under-relaxation by trial & error. I usually use 0.8~0.95 for enthalpy under-relaxation.

Sincerely, Jinwook

  Reply With Quote

Old   August 11, 2001, 03:21
Default Re: combustion natural gas burner
Posts: n/a
A) In addition to Jin, don't try to consider everything in the first Place B) Proceed with step by step: laminar, 2d, low flow rate... DC
  Reply With Quote

Old   October 7, 2001, 14:11
Default Re: combustion natural gas burner
Posts: n/a
hi dear friend

I am wroking on modeling of nozzle mixing gas burner we can share our problems and our developments

if agree to cooperate togather , I will be very happy .

kind regards shahriar .
  Reply With Quote

Old   May 26, 2010, 07:03
New Member
Sudhir Sharma
Join Date: May 2010
Posts: 1
Rep Power: 0
sudhir is on a distinguished road
Hi all
I am a Undergraduate student of mechanical engineering. I am working on a new Design of natural gas burner for domestic applications and simulating this model in CFX so i will be thankful if you could provide me some data and text of your research.My Email Id is
sudhir is offline   Reply With Quote


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
mass flow in is not equal to mass flow out saii CFX 12 March 19, 2018 05:21
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Combustion of the natural gas Jiri Novak FLUENT 1 July 29, 2005 18:16
Natural gas combustion Newbie Main CFD Forum 7 May 22, 2004 04:00
Natural gas combustion Newbie FLUENT 1 May 17, 2004 11:00

All times are GMT -4. The time now is 19:06.