CFD Online Discussion Forums

CFD Online Discussion Forums (
-   FLUENT (
-   -   UDF break_up_rate population balance model QMOM (

Jaron December 8, 2008 04:40

UDF break_up_rate population balance model QMOM
Hello everyone,

Im am writing a UDF to define the break up rate of particles. I have the PB add-on distributed by Fluent. Still i have some basic questions on how the fluent code will perform the integration for the birth of the particles due to breakage. A daughter distribution has to be defined. In the Fluent manual this daughter distribution is given as a function of z= d_2^3/d_1^3 (in the example). But if one uses the QMOM approach one must multiply by L^k(for the kth moment). My question now is: Is the L^k automatically set as a function of z in the fluent code ? Or should the daughter distribution be given in the UDF as a function of d_2 (and not of z)? These question generally come dow to one main question: how does fluent integrate? Over d_2 or over z ?

Thank you all in advance Greetings, Jaron

All times are GMT -4. The time now is 22:19.