Learning Forum

[vikram chahal]

I have a fluid tank and that is partially filled by water. I want to apply a moment on the base of tank through UDF, for that i am using define CG macro. could you please help me how can i do that??

[Prashanth]

Hi: Can you elaborate more on applying moment on base of tank?

[vikram chahal]

yes sir, i am using an UDF described below and hooking at the base of tank by taking rigid body motion,

#include "udf.h"

DEFINE_PROFILE(moment_profile, thread, position)

{

    real t = real t = CURRENT_TIME;

    real moment = 0.0;

    // Apply moment in the z-direction for 2 seconds

    if (t <= 2.0) {

        moment = 5000; // Replace 'your_moment_value' with the desired moment

    }

    // Set the moment components

    real moment_vector[ND_ND];

    moment_vector[0] = 0.0;  // Moment in x-direction (assuming no moment in x)

    moment_vector[1] = 0.0;  // Moment in y-direction (assuming no moment in y)

    moment_vector[2] = moment;  // Moment in z-direction

    // Assign the moment components

    NV_VS(position, =, moment_vector);

}