FC_horizontal_cylinder_ND
The procedure FC_horizontal_cylinder_ND(Ra, Pr: Nusselt) returns the Nusselt number for a horizontal cylinder immersed in a fluid given the Rayleigh and Prandtl numbers. The Rayleigh number should be calculated based on the diameter, D.
Inputs:
Ra - Rayleigh number based on cylinder diameter, D [-]
Pr - Prandtl number of fluid [-]
Outputs:
Nusselt - Nusselt number [-]
Notes:
The procedure FC_horizontal_cylinder_ND is called by the dimensional variant FC_horizontal_cylinder to determine the Nusselt number. The procedure uses the correlations provided by Churchill and Chu (1975). Between 1e7 and 2e7 these two correlations are linearly interpolated in order to avoid any discontinuities. This correlation is therefore valid for all Pr and 1e-10<Ra<1e12.
Example:
Ra=1.5e6
Pr=2.0
Call FC_horizontal_cylinder_ND(Ra, Pr: Nusselt)
{Solution: Nusselt=18.32}