germano_number - Germano number Gn

3.3.2 germano_number - Germano number $Gn$

gn = germano_number(re,r,p,cr)

Computes the Germano number $Gn$ given the Reynolds number $Re$ , the helical pitch $P$ , radius $RH$ and the curvature ratio $Cr$ . The Germano number is then defined as:

ReC2 P/2πR Gn= -----r-----H2 1+ (CrP/2πRH)

Arguments

re: Reynolds number $Re$ .
r: Helix radius $RH$ ( $m$ ).
p: Helix pitch $p$ ( $m$ ).
cr: Curvature ratio (dimensionless)

Returns Germano number $Gn$ , dimensionless.

Possible Errors

Germano-Number unknown amount of arguments: Unknown amount of arguments supplied.
Germano-Number some given helical radius is <= 0: The given helical radius or any of the vector elements, if it is a vector are below or equal to zero.
Germano-Number some given helical pitch is <= 0: The given helical pitch or any of the vector elements, if it is a vector are below or equal to zero.

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