- **OpenFOAM**
(*https://www.cfd-online.com/Forums/openfoam/*)

- - **Description of reactingFoam solver**
(*https://www.cfd-online.com/Forums/openfoam/60691-description-reactingfoam-solver.html*)

Dear all,
I am trying to unDear all,
I am trying to understand the PaSR model implemented in reactingFoam, anybody knows any reference paper? Regards, Daniele |

Hi Daniele,
I have some mateHi Daniele,
I have some material about the Partially Stirred Reactor Combustion Model. If you send me an e-mail, I can give you some references Bye Tommaso |

Dear Tommaso
Could you givDear Tommaso
Could you give some references about the Partially Stirred Reactor Combustion Model. cfdfans@163.com thank you very much! qf |

Hello Tommaso,
I'm also intHello Tommaso,
I'm also interesting in Partially Stirred Reactor model and its cfd implementation. Could you send me some references/informations about it? Is this model the same defined as MIL (lagrangian intermittent model), proposed by Borghi? Can it be used for nonpremixed combustion? Thank you for your attention!!! Michele |

Hi Michele,
the partially Hi Michele,
the partially stirred reactor is basically a modified version of the Eddy Dissipation Concept by Magnussen to account for turbulence/chemistry interaction. Please have a look to the following article: "Flame lift-off in Diesel Engines" by Karlsson and Chomiak published in the proceedings of the combustion institute (I can send you a copy if you need). The PaSR model is generally used for turbulent non-premixed combustion. However, there are different interpretation of the chemical time scale tc and they can play a strong influence on the results. Can I have some references to the MIL model by borghi? Thanks a lot, bye Tommaso |

Dear Tommaso,
can you send meDear Tommaso,
can you send me a copy of the Karlsson paper? The reference for MIL model is: Borghi R. Turbulent combustion modelling, Prog Energy Combustion Sci 1988; 14:245-92 I do not have this paper, but I've read something about it from the work of Veynante and Vervish (Progress in energy and combustion science 28 2002 193-266). The MIL model is based on a calculation of the ignition time by means of a PaSR calculation, and the mean burning rate is obtained from the integration of a pdf function dependent by this time. Thanks a lot, Michele |

Hi Tommaso,
can you send me Hi Tommaso,
can you send me a copy of "Flame lift-off in Diesel Engines" by Karlsson and Chomiak. My e-mail is vascellari@dimeca.unica.it Thank you for your help Michele |

Hi Tomaso
Do you know if I Hi Tomaso
Do you know if I can use the XI-b partial premixed model to calculate non-premixed combustion flow. I'm reading the Henry Weller's report and is not clear for me if I can do it or not. Tanks in advance! Wladimyr |

Hi Wladimir,
the Weller comHi Wladimir,
the Weller combustion model is for PREMIXED COMBUSTION, since it divides each computational cell in two zones: b = 0: fully burnt (burnt gases). b = 1: fully unburnt (air+fuel). The flame propagation speed is proportional to the flame wrinkling (Xi) and to the laminar flame speed. The flame wrinkling depends on the turbulence intensity. In non-premixed combustion, the flame propagation is mainly influenced by mixing. Models for non-premixed combustion usually account for the presence of fuel, air and burnt gases in each computational cell. I can send you the Chomiak and Karlsson paper. However, you should have a look to the following books: Theoretical and Numerical Combustion by Poinsot and Veynante and to Turbulent Combustion by N. Peters They should be very helpful to understand which model is more suitable for your case. Regards Tommaso |

Dear Tommaso
I am working oDear Tommaso
I am working on composite propellant combustion, would you please offer me some references about PaSR model. ahking520@gmail.com thank you in advance! |

Tommaso,
Hi. I was wondering Tommaso,
Hi. I was wondering if you could send me some additional information regarding the PaSR model. jhand085@uottawa.ca Thank you in advance! John Paul Handrigan |

Hi Tommaso
Can reactingFoamHi Tommaso
Can reactingFoam solve for a deflagration to detonation transition ? ( characterize a standing detonation wave in a reacting flow ) or no ? Maybe Xoodles can do this...? The idea is that the increase in pressure caused by the DW causes the non reacted premix to ignite, if the non reacted flow flows with a supersonic speed, since the Detonation wave travels at most at the sound speed of the detonation products, i guess that either reactingFoam or Xoodles could allow me to simulate this... Am I right here...? Thanks for your help Best regards Alex |

Hi Tommaso
Can reactingFoamHi Tommaso
Can reactingFoam solve for a deflagration to detonation transition ? ( characterize a standing detonation wave in a reacting flow ) or no ? Maybe Xoodles can do this...? The idea is that the increase in pressure caused by the DW causes the non reacted premix to ignite, if the non reacted flow flows with a supersonic speed, since the Detonation wave travels at most at the sound speed of the detonation products, i guess that either reactingFoam or Xoodles could allow me to simulate this... Am I right here...? Thanks for your help Best regards Alex |

Deer Tommaso,
Hi. I was wondering the PaSR model in OpenFoam. Is it same as Fluent PDF method? Can u give me some hint? bobo1314@126.com Thank you in advance! Xu Bo |

Hi Xu B,
no the Chalmers PaSR is entirely different from the PDF approach. It is rather related to EDC. For more information look at the thesis of Fabian Peng Karrholm here: http://powerlab.fsb.hr/ped/kturbo/OpenFOAM/docs/ or check the code in chemistry.H of the reactingFoam solver. Regards, Markus. |

Chomiak and Karlsson paperHi Markus,
I would really appreciate if you could send me the " Chomiak and Karlsson paper". my email is: yafarin@gmail.com Best regards |

Hi dear fomers
As you may know, reactingFoam suppose that the Lewis, prandtle number and schmidt number are equal one. so the each species transport equations are as shown in the Yeqn code. Has anyone used "binary mass diffusion coefficient" in the Yeqn equation? I would appreciate it if someone could help me to use reactingFoam with different diffusion coefficient. Kind Regards, |

Hello Tommaso,
I'm also interesting in Partially Stirred Reactor model and its cfd implementation. I was wondering if you could send me some additional information regarding the PaSR model. Could you send me some references/informations about it? Thank you in advance, camille@ccii.be |

All times are GMT -4. The time now is 14:04. |