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*CDRE, file=filename

Data format:

One line with 4 parameters, as follows:

IGR IOP SMIN SMAX

Status:

Optional.

Restriction:

A group must have been previously defined.

Purpose:

To define a drag coefficient function of Reynolds number.

Details :

Parameter	Description
IGR	Group number of the line
IOP	IOP=1 if Reynolds number based instantaneous fluid structure relative velocity chosen IOP=2 if Reynolds number based on current velocity
SMIN	If SMIN is greater than 0, the Reynolds dependent drag coefficient Cd(Re) is not applied for curved positions along the line from 0 to SMIN. The default drag coefficient defined in the beam/bar element property is used instead from 0 to SMIN.
SMAX	If SMAX is greater than 0, the Reynolds dependent drag coefficient Cd(Re) is not applied for curved positions along the line from SMAX to the end of the line. The default drag coefficient defined in the beam/bar element property is used instead from SMAX to the end of the line.
FILE=Filename	Path and name of the data file. The data file consists of 2 columns giving the Z position relative to the sea level (Z=0) and corresponding drag coefficient (Cd) (Shown below). Negative Z-position values indicate location below the sea level. The first Z-position input in the file must be 0.

ReynoldsValue_1     Cd_at_ReynoldsValue_1
ReynoldsValue_2     Cd_at_ReynoldsValue_2
ReynoldsValue_3     Cd_at_ReynoldsValue_3
...
ReynoldsValue_N     Cd_at_ReynoldsValue_N