!syntax description /Mesh/SCMQuadSubChannelMeshGenerator
!! Intentional comment to provide extra spacing
This mesh generator creates the mesh were the SCM solution variables associated with the subchannels live.
The user needs to provide the number of subchannels !param in the -x direction and !param in the -y direction.
The number of cells in the -z direction is given by !param. The distance of the pins from eachother is given by the !param parameter and the total length of the sub-assembly is defined by the parameters:
!param,!param,!param. The fuel pin diameter is given by !param. The user also has the ability to define the effect of spacers or mixing vanes on the subassembly by defining their axial location !param and a local presure form loss coefficient !param. The center of the mesh is the origin. Last the !param is an added distance between a perimetric pin and the duct, such that: distance(edge/corner pin center, duct wall) = pitch / 2 + side_gap.
Note that:
- the vector (in the XY plane) from a corner pin center to the corner subchannel centroid is
$Pitch/2 \vec{i} + Pitch/2 \vec{j}$ . - the vector (in the XY plane) from a corner pin center to the corner of the duct is
$(Pitch/2 + side_gap) \vec{i} + (Pitch/2 + side_gap) \vec{j}$ .
[side_gap] presents a sketch of the SCM geometry nomenclature near the duct corner.
!media subchannel/misc/side_gap.png style=width:90%;margin-bottom:2%;margin:auto; id=side_gap caption=Geometric features of the quadrilateral SCM mesh
!listing /test/tests/problems/psbt/psbt_explicit.i block=QuadSubChannelMesh language=moose
!syntax parameters /Mesh/SCMQuadSubChannelMeshGenerator
!syntax inputs /Mesh/SCMQuadSubChannelMeshGenerator
!syntax children /Mesh/SCMQuadSubChannelMeshGenerator