Module: Boundary Flux ()

Description:

• the mass flow rate is the total mass flux on the boundary,
• the total heat transfer is the total heat flux on the boundary,
• the radiation heat transfer is the total heat flux radiation on the boundary.

Depending on the format of your solver's result, two different computations are done:

• if the input is a scalar field, it is assumed to contain the flux on each face of the boundary. Then a simple sum is computed. Example for the mass flow rate: the scalar field contains the mass flux across each face , where and are the density and the velocity at the center of face f and is the normal area vector of face f. Then the mass flow rate is computed as .
• if the input is a vector field, it is assumed that the product with the normal area vector of each face of the boundary should be computed before computing the sum. Example for the mass flow rate: the vector field contains the product of the density and velocity on each face . Then the mass flow rate is computed as .

Connections:

Data [required]
A 3D Unstructured Model.

Boundary flux [required]
A 3d unstructured Unstructured Model Field scalar or vector field corresponding to the mass flux, heat flux or heat flux radiation, depending on the flux computed.

Ports:

Spreadsheet

The computation results are written in a spreadsheet. Choose append to append the existing spreadsheet, or new to open a new one.

Compute

Choose globally to get one result corresponding to the surface composed of all the selected boundaries. Choose per boundary to compute the result on each selected boundary.

Boundaries filter

Select the grid boundaries where the computation should be done.