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:

Gn= -ReC2rP/2πRH-- 1+ (CrP/2πRH)2

Arguments

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

Returns Germano number $Gn$ , dimensionless.

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