[m.farisabadi]

Hello everybody
i wonder how can i simulate a dissolution phenomena of a salt crystal in water?
i know that i need to write a UDF for Mass Transfer
but the main problem is how can i alter the shape of solid by every time step.
i tried to use "DEFINE DPM SCALAR UPDATE" but i can't understand for example how define for fluent to reduce the size of mesh in every time step.
if somebody could explain for me i will appreciate.
Thank you

[farhad-j]

Originally Posted by m.farisabadi

Hello everybody
i wonder how can i simulate a dissolution phenomena of a salt crystal in water?
i know that i need to write a UDF for Mass Transfer
but the main problem is how can i alter the shape of solid by every time step.
i tried to use "DEFINE DPM SCALAR UPDATE" but i can't understand for example how define for fluent to reduce the size of mesh in every time step.
if somebody could explain for me i will appreciate.
Thank you

I think "CG_MOTION" macro could be appropriate for your udf.

[m.farisabadi]

Originally Posted by farhad-j

I think "CG_MOTION" macro could be appropriate for your udf.

thanks for repllying dear farhad
i believe CG_MOTION is a macro in order to change position of a face or cell not to change the shape
i'm looking for a macro to decrease volume of a face or cell