- **FLUENT**
(*https://www.cfd-online.com/Forums/fluent/*)

- - **DPM-Rosin Rammler distribution -CV probleme
**
(*https://www.cfd-online.com/Forums/fluent/28750-dpm-rosin-rammler-distribution-cv-probleme.html*)

DPM-Rosin Rammler distribution -CV probleme
Hi everybody
I wonder if someone could help me, please I simulate combustion in a cylindrical furnace. I have a continuous gas phase (create in PDF) and there are too some DPM combusting injections. For the injections I use the material anthracite and the Rosin Rammler method. At the beginning I used the min, max, mean diameter and the spread parameter purposes in the fluent5 tutorial guide (Pulverized coal combustion...) After my case is converged, I decreased the min and mean diameter and spread parameter (max diam stay equal) for an other situation. And I iterate... Now I have no more convergence And the residuals do not appear well soon... Has anybody tried this experience? Could anybody help me thanks a lot Bye olivier |

Re: DPM-Rosin Rammler distribution -CV probleme
A) Based on the particle size distribution, you should have realistic, mean, min, max and spread parameter in RR particle distribution model. B) When you changing the parameters: why don't u start from the beginning and set some realistic parameters? B1) Or after first convergence, reset DMP calculations. B2) I don't understand, why did you change the parameters after converging the first case. Are you running another case now with different size of particles ?
DC |

Re: DPM-Rosin Rammler distribution -CV probleme
Hi David A/ In fact at the beginning of the study I didn't have any information about a realistic mean, min max and so a spread parameter for the RR particle distribution. Therefore, I decided to simulate a case with the fluent tutorial parameters. B/ Now, I know the realistic parameters and therefore I simulate a new case with the realistic RR parameters. I got some problems to converge the case. But now it is okay with the convergence. I can anlyse the results.
Bye bye and thanks olivier |

All times are GMT -4. The time now is 17:59. |