[THA SEANGHAI]

Hello! I want to know how to add mass source [kg/m³s] or if it is possible I prefer to add area source [kg/m²s] to a boundary in fluent. How can I do it? Please help me! Thank You!

[torjo]

Hi,

I think you need to turn to UDF programming to do this.

Either:
Create a define_source UDF, in which you identify cells at the wall somehow and apply the source you would like.

Or (and probably better):
Create a define_adjust UDF, in which you do a face loop on the thread of the wall, use F_C0 and THREAD_T0 to identify the cell corresponding to the face, and set a C_UDMI corresponding to the source you would like.
Then create a define_source UDF that sets the source term to the C_UDMI value.

BR.
Torjo

[THA SEANGHAI]

Originally Posted by torjo

Hi,

I think you need to turn to UDF programming to do this.

Either:
Create a define_source UDF, in which you identify cells at the wall somehow and apply the source you would like.

Or (and probably better):
Create a define_adjust UDF, in which you do a face loop on the thread of the wall, use F_C0 and THREAD_T0 to identify the cell corresponding to the face, and set a C_UDMI corresponding to the source you would like.
Then create a define_source UDF that sets the source term to the C_UDMI value.

BR.
Torjo

Thank for your idea!I am very young in UDF, I will take a look at what you said, and I will come here again if I do not understand anything!