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-   -   6Dof Solver + Moving Object in fluent (https://www.cfd-online.com/Forums/fluent/112033-6dof-solver-moving-object-fluent.html)

 PouyanJ January 20, 2013 22:56

Body to rotate by action of the air flow - 6Dof Solver + Moving Object in fluent

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 August 21, 2013 05:43

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 September 25, 2013 06:41

try here

 like.no.other September 25, 2013 07:49

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 August 1, 2014 19:33

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

 shayegan August 7, 2014 03:13

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 August 18, 2014 01:26

Quote:
 Originally Posted by shayegan (Post 504751) 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 August 18, 2014 02:49

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 October 15, 2014 21:18

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 November 18, 2014 08:54

Thanks for the help.

 pakk November 18, 2014 09:05

Log in, go to "Tutorials & Training Materials", and search for "falling box".

 amin.z February 23, 2015 08:48

Quote:
 Originally Posted by shayegan (Post 506405) 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 February 23, 2015 09:57

Log in, go to "Tutorials & Training Materials", and search for "falling box".

 amin.z February 24, 2015 09:57

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 September 30, 2015 14:40

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 October 6, 2015 15:27

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 October 6, 2015 19:55

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 October 29, 2015 18:52

Looking for the tutorial files of box falling in water

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?

Thanks

 Vania February 28, 2016 10:10

Hi guys

Hiiii

A useful reference for your problem

http://goo.gl/663zNX

 hdariya March 17, 2016 06:33

Body to move by action of the fluid flow - 6Dof Solver + Moving Object in fluent

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.

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