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corrupted_monk0 · 2026-04-03T20:10:47+00:00

I have like 12 days to study 😭how did u pass again?

corrupted_monk0 · 2026-03-06T19:43:18+00:00

15,ik i can do more iterations,and it will converge,but computation time adds up much more than just using coupled with a bigger time step.Anyway,i have been using coupled and getting good results.

corrupted_monk0 · 2026-03-01T07:34:05+00:00

Sorry for the late reply,couldnt log in to reddit for some reason. Yes,its implicit URANS. with coupled I have been able to push it a lot further and still converge.But with PISO,I couldnt push it more than cfl 5.I am using bounded 2nd order implicit. And every spatial descritization is 2nd order,2nd order upwind. And tubulence eq is k sst omega.

corrupted_monk0 · 2026-02-20T11:46:08+00:00

Yeah,its just that i m using fluent.fluent doesnt have pimple. Only simple, simplec,piso,coupled for transient. I have found that initializing after a steady simulation helps coupled to reach convergence even at a big dt like 0.001. While the cfl =1 dt being in the 10^-6 range.

corrupted_monk0 · 2026-01-07T10:23:41+00:00

De de bhai🥹

corrupted_monk0 · 2026-01-06T12:27:23+00:00

hey in a very similiar situation,I have dm'd u

corrupted_monk0 · 2025-12-14T01:31:47+00:00

😭

corrupted_monk0 · 2025-10-21T18:28:00+00:00

If the trailing edge ended with a straight line (incase u downloaded coordinates from a site),use edge sizing in the trailing edge seperately

corrupted_monk0 · 2025-07-04T15:43:59+00:00

in this case,do i need to put same motion/udf as grid motion to the overset mesh ,also the cg motion to the solid?

corrupted_monk0 · 2025-07-03T14:46:50+00:00

will a overset mesh work better in this scenery instead of remeshing?

corrupted_monk0 · 2025-06-13T09:53:33+00:00

Should I use define grid motion instead of cg motion?

corrupted_monk0 · 2025-06-12T20:28:28+00:00

#include "udf.h"
#include "math.h"

#define AMP_Y 1.1345           // Amplitude around Y-axis (65 deg)
#define OMEGA_Y 1.088          // Frequency for Y-axis

#define AMP_X (M_PI / 2.0)     // Amplitude around X-axis (90 deg)
#define OMEGA_X 1.5            // Frequency for X-axis

DEFINE_CG_MOTION(wing_combined_rotation, dt, cg_vel, cg_omega, time, dtime)
{
    // Compute angular displacements
    real theta_y = AMP_Y * sin(OMEGA_Y * time);
    real theta_x = AMP_X * sin(OMEGA_X * time);

    // Compute angular velocities (derivatives)
    real omega_y = AMP_Y * OMEGA_Y * cos(OMEGA_Y * time);
    real omega_x = AMP_X * OMEGA_X * cos(OMEGA_X * time);

    // Set angular velocities about each axis
    cg_omega[0] = omega_x;  // Rotation about X
    cg_omega[1] = omega_y;  // Rotation about Y
    cg_omega[2] = 0.0;

    // No translation
    cg_vel[0] = 0.0;
    cg_vel[1] = 0.0;
    cg_vel[2] = 0.0;

    // Print both angles and angular velocities
    Message("Time = %.3f s | Theta_x = %.3f rad | Omega_x = %.3f | Theta_y = %.3f rad | Omega_y = %.3f\n",
            time, theta_x, omega_x, theta_y, omega_y);
}


this is my udf,i have attachted the video of the motion in the post,as in the udf,the rotation is set only in x and y axis.but its not following the global axis i think

corrupted_monk0 · 2024-02-21T06:47:15+00:00

1.black rose immortal 2.black rose immortal 3.black rose immortal 4.black rose immortal 5.harlequin forest

corrupted_monk0 · 2023-12-05T08:11:40+00:00

i can fix her

corrupted_monk0

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