4. DS_SOURCE Namelist

The DS_SOURCE namelist is used to define external volumetric sources for species transport model.

4.1. Overview

4.2. DS_SOURCE Namelist Features

Required/Optional : Optional

Single/Multiple Instances: Multiple

4.3. Components

Equation
Cell_Set_IDs
Source_Constant
Source_Function

Equation

Description : The name of the equation this source applies to.
Type        : string
Default     : none
Valid Values: “concentration1”,”concentration2”, …
Note        : Any name may be specified, but Truchas will only look for and use DS_SOURCE namelists with the indicated equation names; any others are silently ignored.

Cell_Set_IDs

Description : A list of cell set IDs that define the subdomain where the source is applied.
Type        : a list of up to 32 integers
Default     : none
Valid Values: any valid mesh cell set ID
Note        : Different instances of this namelist with a given Equation value must apply to disjoint subdomains; overlapping of source functions is not allowed. Exodus II mesh element blocks are interpreted by Truchas as cell sets having the same IDs.

Source_Constant

Description : The constant value of the source function.
Type        : real
Default     : none
Note        : Either Source_Constant or Source_Function must be specified, but not both.

Source_Function

Description : The name of a FUNCTION namelist that defines the source function. That function is expected to be a function of (t,x,y,z).
Type        : string
Default     : none
Note        : Either Source_Function or Source_Constant must be specified, but not both.