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K_e_SquareChannelHeader
The K_e_SquareChannelHeader(Re, sigma) function returns the expansion coefficient for flow leaving a set of square channels.
The inputs are:
Re = Reynolds number in the channel
sigma = ratio of area for flow in all of the channels to area for flow in the header
Note that the expansion coefficient is defined in terms of the velocity in the channels.
Example:
Re=4000
sigma=0.4
K_e=k_e_squarechannelheader(Re, sigma)
{Solution:
K_e = 0.3424
}
Notes:
For Re>3000 the turbulent solution is used and for Re<2000 the laminar solution is used. From 2000<Re<3000 the result is interpolated between laminar and turbulent. The solution is taken from the graph presented in Kays and London (1986).
Minor Losses Index