Incropera, Laminar and Turbulent
Description
 Type
 BI_FLAT_PLATE_NU
 Subtype
 INCP_FLPLATE_BI
Index  UI Name (.flo label)  Description 

1  Velocity Type (VEL_TYPE)  Method to get a velocity for the Reynolds number.
If AUTO, the chamber velocity will be used if the convector is attached to a flow chamber, and user input velocity will be used if the convector is not attached to a flow chamber. 
2  Chamber for Velocity (VEL_CH)  ID for the low chamber that will be used for the
velocity. If AUTO, the flow chamber ID attached to the convector will be used. 
3  Constant Velocity (FLOW_VEL)  The flow velocity if VEL_TYPE=2 or VEL_TYPE=AUTO, and the convector is not attached to a chamber. 
4  Length Scale (LENGTH)  The distance back from the plate's leading edge for the local HTC, or the entire length of the plate for an average HTC. 
5  Local or Average HTC (LOC_AVG)  Type of equation to use.

6  Transition Re (RE_TRANS)  The Reynolds Number where the transition from laminar to
turbulent flow occurs. If AUTO, RE_TRANS=500,000. 
7  HTC Multiplier (HTC_MULT)  A constant multiplier to scale the value of the heat transfer coefficient obtained from the correlation. 
8  Free Convection Nu (FREE_HTC)  The equation to use for free convection blending.
If AUTO, FREE_HTC=2. 
9  Free Mixing Sign (FREE_ASSIST)  The sign of the free and forced HTC blending.
If AUTO, FREE_ASSIST=1. 
10  Free Length Scale (FREE_LEN)  The length scale for the free convection HTC calculation.
If AUTO, FREE_LEN = LENGTH 
11  Horizontal Free Surface Dir (FREE_SURF_DIR)  Direction of horizontal plate that is used if FREE_HTC=3

Formulation
This correlation uses a Nusselt Number equation by found in Incropera (ref 1).
For Re < RE_TRANS (~500,000)
For Re > RE_TRANS (~500,000) with a portion of laminar flow also on the plate
For all turbulent flow on the plate (boundary layer tripped near leading edge)
For all turbulent flow at the local point on the plate
Index  .flo label  Description 

1  TNET  Thermal network ID which has the convector where this correlation is used. 
2  CONV_ID  Convector ID which is using this correlation. 
3  VELOCITY  Flow velocity along the plate. 
4  LENGTH  Plate length. 
5  RE  Reynolds number. 
6  REGIME  Laminar or turbulent. 
7  TYPE  Local or average. 
8  Nu  Nusselt number. 
9  HTC  Calculated Heat Transfer Coefficient. 
Heat Transfer Correlation References
 Incropera, F. and Dewitt, D. Fundamentals of Heat and Mass Transfer, 6th Edition, John Wiley & Sons, 2006.