Pipeline Toolbox
Function Reference Manual
Early Public Release DD-00011-000

3.3.1 dean_number - Dean number De
de = dean_number(re,d,r,p=undefined)

Computes the Dean number De given the Reynolds number Re , the helix radius RH and the pipe internal diameter D. The Dean number is then defined as:

De=Re D 2RH

Optionally the pitch of the helix P can be specified, in which case the following more complete definition of the Dean number will be used:

De=Re d 2RH (1+ ( P2πR H )2 )

Arguments

re

Reynolds number Re .

d

Pipe internal diameter D (m).

r

Helix radius RH (m).

p

Helix pitch P.

Returns Dean number De , dimensionless.

Possible Errors

Dean number unknown amount of arguments

Unknown amount of arguments supplied.