FC_plate_horizontal2
The procedure FC_horizontal2(Fluid$, T_s, T_infinity, P, L : h, Nusselt, Ra) returns the heat transfer coefficient, Nusselt number and Rayleigh number for a horizontal flat plate that is downward heated or upward cooled. The characteristic length of the plate is the ratio of the area to the perimeter. The units of the inputs and outputs depend on the unit settings in EES. Gravity is assumed to be 9.807 [m/s^2].
Inputs:
Fluid$ - string name of any fluid in the EES database. The fluid can be an ideal gas or a real fluid
T_s - surface temperature of the plate in [C], [K], [F], or [R].
T_infinity - bulk temperature of the fluid in [C], [K], [F], or [R].
P - ambient pressure in [Pa], [kPa], [bar], [MPa], [atm], or [psia]
L - characteristic length of the plate [m] or [ft], defined as the ratio of the area to the perimeter
Outputs:
h - heat transfer coefficient in [W/m^2-K] or [Btu/hr-ft^2-R]
Nusselt - Nusselt number [-]
Ra - Rayleigh number [-]
Notes:
The procedure FC_plate_horizontal2 is responsible for determining the fluid properties, and calculating the Rayleigh and Prandtl number. Once these values are found, the non-dimensional procedure FC_plate_horizontal2_ND is called to calculate the Nusselt number. FC_plate_horizontal2, in turn, uses the Nusselt number to calculate the coefficient of heat transfer as described in section 6.2.2 of Nellis and Klein.
Example:
$UnitSystem SI deg K J Pa
$VarInfo h units=W/m^2-K
Fluid$='air'
T_s=350 [K]
T_infinity=300 [K]
P=101300 [Pa]
L=0.5 [m]
W=0.5 [m]
tilt=45 [deg]
Call fc_plate_horizontal2(Fluid$, T_s, T_infinity, P, L: h, Nusselt, Ra)
{Solution:
h=1.235 [W/m^2-K]
Nusselt=22.47
Ra=4.128E+08}