[hrvig]

Hi,
I am to model a flat aluminium plate falling freely under gravity in water in 2D. The plate has a length of 50 mm and a height of 2.5 mm (1 m in z-direction?). I've been looking at the Fluent userguide:

SDOF_MASS /* mass */
SDOF_IXX, /* moment of inertia */
SDOF_IYY, /* moment of inertia */
SDOF_IZZ, /* moment of inertia */
SDOF_IXY, /* product of inertia */
SDOF_IXZ, /* product of inertia */
SDOF_IYZ, /* product of inertia */

But no matter how I specify the moment of inertia, the plate does not seem to rotate the way it should. I'm comparing with a simple numerical model based on lift and drag coefficients.

Does anyone know how to specify the properties correctly?

Best regards,
Hrvig