FC_vertical_channel
The procedure FC_vertical_channel(Fluid$, T_s, T_infinity, P, L, S : h, Nusselt, Ra) returns the heat transfer coefficient, Nusselt number and Rayleigh number for an vertical open channel of length L and spacing S. The units of the inputs and outputs depend on the unit settings in EES. The magnitude of gravity is assumed to be 9.807 [m/s^2].
Inputs:
Fluid$ - 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 - length of the channel [m] or [ft]
S - spacing of the channel [m] or [ft]
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_vertical_channel is primarily responsible for determining the fluid properties, and calculating the Rayleigh number. The non-dimensional procedure FC_Vertical_Channel_ND is called to calculate the Nusselt number. FC_vertical_channel, in turn, uses the Nusselt number to calculate the coefficient of heat transfer in the manner described in section 6.2.5 of Nellis and Klein.
Example:
$UnitSystem SI deg K J Pa
$VarInfo h units=W/m^2-K
P=101.3E3 [Pa]
T_s=315 [K]
T_infinity=300 [K]
S=0.09 [m]
L=3 [m]
Fluid$='air'
Call fc_vertical_channel(Fluid$, T_s, T_infinity, P, L, S : h, Nusselt, Ra)
{Solution:
h=2.256 [W/m^2-K]
Nusselt=7.748
Ra=931211
}