CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Effect of heat loss ratio dimension on FGM table

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 15, 2020, 13:14
Default Effect of heat loss ratio dimension on FGM table
New Member
Join Date: Oct 2019
Posts: 1
Rep Power: 0
twb2k8 is on a distinguished road
I am performing a RANS simulation of a turbulent premixed flame, with an isothermal wall set at 600 K. To simulate the flame, am using the FGM method with progress variable, mixture fraction and heat loss ratio as controlling variables. I am comparing my results with a simulation that does not include heat loss ratio in its flamelet tabulation and underpredicts peak flame temperature.

I want to better understand why the inclusion of heat loss ratio in the table results in a better prediction of peak temperature. My understanding so far is:
  • Temperature is computed during FGM tabulation using the enthalpy equation: "H2 - H1 = Cp(T2 - T1)"
  • In a table with no heat loss, heat capacity is associated with a synchronised change between temperature and mixture fraction, as progress variable changes
  • Being able to access the table with heat loss ratio as a controlling variable allows for different heat capacities and subsequently different temperatures to be retrieved for any given progress variable
  • Because of this, temperatures away from the wall can still be high whilst near wall temperatures are cool

Is what I'm saying correct? I think there's some gaps in my understanding, particularly with the effect of different heat capacities on how temperature is obtained by the solver accessing the table, near and away from the wall.

Thanks for any help you can give!
twb2k8 is offline   Reply With Quote


combustion, fgm, flamelet, heat capacity, heat loss

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
Simulating Capillary Effect in a heat pipe wick ruiarahul Fluent Multiphase 3 April 5, 2020 04:43
Simulating Capillary Effect in a heat pipe wick ruiarahul CFD Freelancers 2 July 13, 2019 12:16
Heat loss through walls franzdrs FLUENT 6 March 29, 2010 12:11
Heat loss through walls franzdrs Main CFD Forum 2 September 30, 2009 06:33
heat loss ss Siemens 0 February 19, 2004 00:07

All times are GMT -4. The time now is 04:58.