[PouyanJ]

Hi everybody. I need your help.

Here, I have a channel (2D) with a inclined rectangle in the middle and I'd like to simulate the rotation of this object by action of the fluid flow. I've been using a 6DOF udf together with dynamic mesh, but when I run the solver, the rectangular object wont rotate. I decreased the values of Moment of Inertia to even very low numbers, but it didn't rotate again. Would it be possible to help me what to do?

I used the following UDF file (however I Changed the values of mass and moment of inertia):

DEFINE_SDOF_PROPERTIES(body, prop, dt, time, dtime)
{
prop[SDOF_MASS] = 666.66;
prop[SDOF_IXX] = 129.6296;
prop[SDOF_IYY] = 111.1111;
prop[SDOF_IZZ] = 129.6296;

printf ("\n2d_test_box: Updated 6DOF properties");
}

[thanhvn]

Hi PouyanJ

I think that you should be addition some water's property density of water, sound of water in your UDF.

Can you read more detail in " Falling box in water " Tutorial ansys fluent
Good Luck!

[Centurion2011]

try here

[like.no.other]

Hi Pouyan
If you want to simulate only rotation of body, you must restrict the motion in other directions.
you should use this macro for restriction of motion:
prop[SDOF_ZERO_TRANS_X] = TRUE;
prop[SDOF_ZERO_TRANS_Y] = TRUE;
prop[SDOF_ZERO_ROT_X] = TRUE;
prop[SDOF_ZERO_ROT_Y] = TRUE;

[mahditorabiasr]

Dear Pouyan, may I know your dynamic mesh setup. Maybe this problem comes from ill dynamic mesh configuration.

[shayegan]

Hi everyone

I have been working on moving projectile i barrel. I need udf for dynamic mesh(Six degree of freedom solver). can anyone help me?

[Config]

Originally Posted by shayegan

Hi everyone

I have been working on moving projectile i barrel. I need udf for dynamic mesh(Six degree of freedom solver). can anyone help me?

hello
if you want to just simulate "moving" use this and replace your weight:

#include "udf.h"
DEFINE_SDOF_PROPERTIES(proj, prop, dt, time, dtime)
{
prop[SDOF_MASS] = 1;
}
the other progress of solve is in "projectile moving inside a barrel"pdf that you want it i can send it for you

[shayegan]

Thank you for the reply

I just have pdf file of this tutorial, could u please send me the case and data files of tutorial?

Thanks a lot
amin.ntea@yahoo.com

[sxhdhi]

Hi， all

Could you please also send me the following falling box files:
6dof-mesh.msh.gz
6dof_2d.c

at sxh@dlut.edu.cn

thanks!

Best Regards

sxh

[99valentine]

Thanks for the help.

[pakk]

These files can be downloaded from the ansys customer portal.
Log in, go to "Tutorials & Training Materials", and search for "falling box".

[amin.z]

Originally Posted by shayegan

Thank you for the reply

I just have pdf file of this tutorial, could u please send me the case and data files of tutorial?

Thanks a lot
amin.ntea@yahoo.com

Hi dear Arash
I'm also looking for these files ( case, data & UDF of moving projectile inside barrel)
could you please send these files to me if you find them?

CFDSimulation@yahoo.com

[pakk]

These files can be downloaded from the ansys customer portal.
Log in, go to "Tutorials & Training Materials", and search for "falling box".

[amin.z]

guys! I can't find the tutorial file in ansys customer portal!
I need your help! anyone could help me to find these files?
a direct link to ansys customer portal or a keyword to find these or something like this!

The files are:
Tutorial: Projectile Moving Inside a Barrel
projectile.msh.gz
aneos.c
six_dof_property.c

[tuananhtran56]

Hi dear pakk!
I'm also looking for mesh and udf file for this tutorial: the box falling the water.
could you please send these files to me if you have?
Thansk a lot.
My email: tuananhtran.kthk56@gmail.com

[rqb7231]

Hi， all

Could you please also send me the following falling box files:
6dof-mesh.msh.gz
6dof_2d.c

at rqb7231@yahoo.com

thanks!

Best Regards

[Baxter]

Hi, I'm just using the free student version of Fluent and so don't have a login to the customer portal. If someone could please email the files for the box falling in water and/or the bullet in the gun barrel I would really really appreciate it! Email: jesse.anderson303@gmail.com

Best regards

Jesse

[Edgar]

Hello,

I am trying to do a simulation to observe the behavior of a macroscopic particle in a stream flow. I think that this tutorial will be very helpful, but I do not have the UDF file.

Could someone share with me these files (6dof-mesh.msh.gz and 6dof 2d.c), please?

My email is: eem370@mail.usask.ca

Thanks

[Vania]

Hiiii

A useful reference for your problem

http://goo.gl/663zNX

[hdariya]

Hi everybody. I need your help.

i have a problem in move body by the action of fluid flow.
for that i want udf. so that i can move body in particular direction with the help of action of fluid flow.
in my problem i want to move piston under cylinder.