modelSquareSubChannel

Parameters

Type	Name	Default	Description
Integer	nV (from Generic)	4	# of discrete axial volumes
Integer	nSurfaces (from Generic)	1	Number of transfer (heat/mass) surfaces for coolant channel
Real	nPins (from Generic)	1	# of solid media pins
Real	nPins_nonFuel (from Generic)	0	# of pins non-fueled pins (e.g., control rod guides)
Integer[nRegions]	nRs (from Generic)	fill(3, nRegions)	# nodes in each region's radial direction
String	channelType	"Center"	Flow channel type
Internal Interface
Integer	nRegions (from Generic)	1	# of regions in solid media

Type	Name	Default	Description
SI.Length	pitch	2*rs_outer[end] + 0.01	Distance between pin centers
SI.Length	gap_PW	0.5*pitch	Gap between pin center and wall
SI.Length	dimension (from Generic)	4*crossArea/perimeter	Characteristic dimension (e.g., hydraulic diameter)
SI.Area	crossArea (from Generic)	pidimensiondimension/4	Cross-sectional flow areas
SI.Length	perimeter (from Generic)	4*crossArea/dimension	Wetted perimeters
SI.Length	length (from Generic)	1.0	Pipe length
SI.Height	roughness (from Generic)	2.5e-5	Average heights of surface asperities
SI.Area[nSurfaces]	surfaceArea (from Generic)	{2pirs_outer[end]lengthnPins}	Area per transfer surface
SI.Angle	angle (from Generic)	0.0	Vertical angle from the horizontal (-pi/2 < x <= pi/2)
SI.Length	dheight (from Generic)	length*sin(angle)	Height(port_b) - Height(port_a) distributed by flow segment
SI.Length	height_a (from Generic)	0	Elevation at port_a: Reference value only. No impact on calculations.
SI.Length[nRegions]	rs_outer (from Generic)	{if i == 1 then 0.01 else rs_outer[i - 1] + 0.001 for i in 1:nRegions}	Outer radius of each region {r_outer[1],...,r_outer[n]}