CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Combustion with injection

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

LinkBack Thread Tools Display Modes
Old   December 5, 2014, 06:44
Default Combustion with injection
Nikolaos Babilas
Join Date: Nov 2014
Posts: 37
Rep Power: 4
NiBa is on a distinguished road
Hello everyone. I have a combustion chamber with a combustion with injection from an inlet and air from the other. in boundary i have inlet verlocity fuel 0.04 and for air 0.25. the geometry is 0.25xo.25x0.25 (3D). i have reduce a lot the under relaxation factors. i use the option->define injection where i choosetype of injection -> group with zero velocities in x,y,z and total mass flow rate 0.3. i follow the instruction from a tutorial for injection coal mv volatiles for all the other options.
I initialize from none condition. when i run calculation(500 iterations) the residuals are fine up to 40 iterations and then diverge all the equations! the error the appears above the divergence is invalid cp (0.00000J/kgxK) for coal volatiles air but i have follow the instructions of the tutorial and i define the cp=1000. i use also simple as a solver.
Any idea?
thank you
NiBa 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
Coal combustion injection properties semo FLUENT 12 May 16, 2017 19:40
How to mesh a combustion chamber with injection shahrbanoo AVL FIRE 0 April 9, 2014 11:03
injection problem Mark New FLUENT 0 August 4, 2013 01:30
Experimental data in combustion anf fuel injection Farhath FLUENT 0 July 13, 2006 07:06
injection in Combustion problem CCS FLUENT 2 November 21, 2003 10:20

All times are GMT -4. The time now is 00:43.