Reply To: coupled simulation of vehicle and fluid tank

[vikram chahal]

could you please provide the UDF code. i have write this one 

#include "udf.h"

DEFINE_SOURCE(moment_source, c, t, dS, eqn)

{

    real time = CURRENT_TIME; // Get the current simulation time

    real moment = 0.0; // Initialize moment to zero

    real CG[ND_ND]; // Center of gravity coordinates

    real cellCG[ND_ND]; // Cell center coordinates

    C_CENTROID(CG, c, t); // Get CG of the domain

    C_CENTROID(cellCG, c, t); // Get cell center coordinates

    real distance_from_CG = cellCG[2] - CG[2]; // Distance along z-axis

    /* Check if time is within the specified duration */

    if (time <= 2.0)

    {

        /* Apply moment only to cells at CG */

        if (distance_from_CG = 0.0)

        {

            moment = 5000.0; // Apply 5000 Nm moment

    }

    dS[eqn] = 0.0; // Reset the source term

    return moment; // Return the moment as the source term

}

and hooked as the souce term of fluid domain under cell conditions.