[fluentnoob]

Hi all!

I am trying to do find the Drag on a small underwater marine vehicle. Its .8 m in Length and comprises of two bodies: One ellipsoid on top, and a cylinder below it.

The total area is .8 sq-m and the speed at which this vehicle is supposed to travel is 0.4 m/s. Now when I solve for this vehicle using the K-epsilon realizable model for the X component of force on the vehicle, I get really low values for the force and the drag coefficient( 4.4 N and Total coefficient(pressure + viscous) as given by FLUENT is .0054).Could you please help me out with what am I doing wrong?

Also, when I had a look at the center of pressure of the object, the solver showed me a value which was like REALLY far away from the vehicle. Would you please please please help me out with this?

Thanks a lot.

DT