UDFs - Population balance model
 

Hi

I am using the population balance module of Fluent 6.3 version.I am using the macro DEFINE_PB_BREAK_UP_RATE to define my own particle breakage kernel.

There are seven arguments to DEFINE_PB_BREAK_UP_RATE:name, cell, thread, d 1, d 2,freq, and pdf. d 1, d 2, freq, and pdf are variables that are passed by the FLUENT solver.

I would like to print out the values of d 1 and *freq and *pdf.How can I do this? Can anyone help me with this?

Thanks Sri

Re: UDFs - Population balance model
 

Hello, Store it in the UDM. User defined Memory. Contact me at kp@dal.ca

Hi KP,

I want run population balance method in fluent. i am new user to it could please send if you have any tutorial cases

thanks
John

Hi johnwinter:

I am reading the manual of PBM now. Then, can I ask you some questions?
1. I used a 2D fluidised bed model to calculate the PBM in fluent. In my model, there is a velocity inlet and a pressure outlet. I choosed the QMOM method for example. when setting initial condition of moments, I should set for both inlet and outpet, or just inlet should be ok?
2. After simulation, how to check the result of the moments? In Report>moment/number density?
3. Did you solve the population balance equation by writing code by yourself?
Thank you and best wishes


Hi Liu,

I am not sure whether i am right or not but what i will tell you what i did
1. I have set at inlet only
2. i too did the same, that is where it is confusing how to get the number concentration is not clear?. my application coagulation of aerosols
3. i have utilized fluent add-on

Dear Sri,
Did you get the same results with udf as that of in-built model?
I am trying to write brteakage and coalescence model of Luo but having some error in simulations. The results are not matching.
Thanks.

How to write UDF for Luo breakage kernel
 

Hi,

I'm trying to write UDF for Luo breakage kernel on PBM but it always fails.

I would like to modify some of the Luo model parameters to match the experimental results.

Can anyone help?

Thank you