CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   FLUENT (https://www.cfd-online.com/Forums/fluent/)
-   -   Can't get combustion to work (https://www.cfd-online.com/Forums/fluent/238644-cant-get-combustion-work.html)

Khadorna September 24, 2021 05:25

Can't get combustion to work
 
Hi ! :)

I have been trying to simulate combustion with the reduced GRIMECH files provided by fluent. However, when I try to simulate combustion, temperature does not rise. Im using k-eps. and Eddy Disipation to simulate combustion.

It consists of a circular 2D chamber where hydrogen enters into the air-filled chamber, and then should proceed to combust. I tried patching the temperature in the chamber to around 2000K, but it does not start the combustion either, the temperature gets reduced eventually.

When I try the same simulation, but using instead the Hydrogen-Air mixture given by Fluent drop-down list, combustion seems to work properly, but I need Grimech in order to get to better degrees of precission and NOx calculations.

When I loaded the kinetics, thermo and transport files from fluent I got: "Error: %set-material!: material not foundError Object: #f" Is it relevant? Should I take any more care into the kinetic loading? Should I import the thermo.dat file into the Thermodynamic Database File in the species tab? Is there anyway to kickstart the combustion appart from patching?

Thank you in advance for your help


All times are GMT -4. The time now is 12:41.