VectorFromVariableComponentsMaterial computes a vector material property with
name specified by the vector_prop_name parameter from coupled variable
components. The x-component is computed through the u coupled
variable. Optional coupled variables v and w compute the y- and z-components
respectively.
An example of this object's use is shown in the listing below where in this case a velocity material property is being declared. The ability to pass constants to the coupled variables is leveraged in this example. Actual coupled variable instances would be used in, for example, a Navier-Stokes simulation in which the nonlinear system solves for velocity components and the vector velocity needs to be constructed.
!listing test/tests/dgkernels/passive-scalar-channel-flow/test.i block=Materials
!syntax parameters /Materials/VectorFromVariableComponentsMaterial
!syntax inputs /Materials/VectorFromVariableComponentsMaterial
!syntax children /Materials/VectorFromVariableComponentsMaterial