Energy Source Option

Properties

Unless otherwise specified, the conditions below apply to fluid, porous, and solid regions.

Energy Source Option

Provides energy source options for the region.

None

Do not specify an energy source.

Volumetric Heat Source

Specifies a user-defined volumetric heat source in W/m³.

Activating this option when using the Segregated solver adds the following nodes under the Physics Values node:

Volumetric Heat Source
Energy Source Temperature Derivative

Activating this option when using the Coupled solver adds the following nodes under the Physics Values node:

Volumetric Heat Source
Energy Source Pressure Derivative
Energy Source Temperature Derivative
Energy Source Velocity Derivative

Total Heat Source

Specifies a user-defined total heat source in W.

Activating this option when using the Segregated solver adds the following nodes under the Physics Values node:

Heat Source
Energy Source Temperature Derivative

Activating this option when using the Coupled solver adds the following nodes under the Physics Values node:

Heat Source
Energy Source Pressure Derivative
Energy Source Temperature Derivative
Energy Source Velocity Derivative

If the profile for the heat source uses field functions or user code, the relation between the heat sources for individual cells, as specified by the field function, and the heat source for the entire region is:

$h_{c} = h_{t o t} V_{c} / V_{t o t}$

where:

$h_{c}$ is heat source for the cell.
$h_{t o t}$ is total heat source in the volume or on the surface.
$V_{c}$ is the cell volume.
$V_{t o t}$ is the total volume.

For two-dimensional simulations, the volumes are replaced by surface areas.

Specific Heat Source

Specifies a user-defined specific heat source in W/kg.

Activating this option when using the Segregated solver or the Coupled solver adds the following nodes under the Physics Values node:

Specific Heat Source
Energy Source Temperature Derivative

Heat Exchanger

Specifies a heat exchanger source term.

Activating this option when using the Segregated solver or the Coupled solver adds the following node under the Physics Conditions node:

Heat Exchanger Exit Temperature Specification

Activating this option when using the Segregated solver or the Coupled solver adds the following nodes under the Physics Values node:

Heat Exchanger Minimum Temperature Difference
Heat Exchanger Total Energy Rate
Heat Exchanger Boundaries
Heat Exchanger First Iteration
Heat Exchanger Temperature

This option is only available with fluid and porous regions.