How can I add mass source or area source(if possible) to a Wall boundary in Fluent?

THA SEANGHAI · September 9, 2020, 01:59

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 · September 9, 2020, 08:41

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 · September 9, 2020, 20:51

Quote:

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!

September 9, 2020, 01:59	How can I add mass source or area source(if possible) to a Wall boundary in Fluent?	#1
THA SEANGHAI New Member THA SEANGHAI Join Date: Aug 2020 Location: Cambodia Posts: 25 Rep Power: 6	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!

September 9, 2020, 08:41	Possible solution	#2
torjo New Member Join Date: Apr 2018 Posts: 8 Rep Power: 8	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 likes this.

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