FC_Annular_Enclosure_ND
Procedure FC_Annular_Enclosure_ND(Ra, Dratio : Nusselt) returns the Nusselt number associated with free convection in an annular space that is formed between two concentric horizontal cylinders.
Note that the area of the inner cylinder should be used when computing heat transfer rate.
The correlation that is used is from Barron and Nellis, Cryogenic Heat Transfer, 2nd Edition, CRC Press, 2016.
See FC_Annual_Enclosure for a dimensional correlation for this geometry.
Inputs:
Ra - Raleigh number
Dratio - diameter ratio, Dout/Din
Outputs:
Nusselt - Nusselt number [-]
Example:
Ra=1e7
Dratio=1.2
Call fc_annular_enclosure_nd(Ra,Dratio:Nusselt)
{Solution:
Nusselt = 11.02}