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*COADIR

Data format:

One line with 8 parameters, as follows:

IPRO ITYP CDP CDM CAP CAM CMP CMM

Status:

Optional.

Restriction:

An element property must be previously defined.

Purpose:

To define hydrodynamic coefficients (drag, added mass and inertia) function of the direction of the fluid-structure velocity along an element axis. This allows setting different hydrodynamic coefficients function of the direction of the relative axial fluid velocity with respect to the orientation of the line. Positive direction is from End1 towards End2 where End1 and Enad2 are the first and last node of the element respectively

Details:

Parameter	Description
IPRO	Identification number of a previously defined property with *CABPRO, *BEAMPRO, *RIGIPRO, *BARPRO
ITYP	Type of property. ITYP = 1: cable (*CABPRO) ITYP = 2: beam (*BEAMPRO, *RIGIPRO) ITYP = 3: bar (*BARPRO)
CDP	Drag coefficient for positive velocity
CDM	Drag coefficient for negative velocity
CAP	Added mass coefficient for positive velocity
CAM	Added mass coefficient for negative velocity
CMP	Inertia coefficient for positive velocity
CMM	Inertia coefficient for negative velocity