CFD Online Discussion Forums - 6Dof Solver + Moving Object in fluent

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CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)

- FLUENT (https://www.cfd-online.com/Forums/fluent/)

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

pakk	March 17, 2016 05:38

So, which help do you want? Do you want help in how to make the UDF? Help in getting the UDF that you already made to work? Or just mental support?

hdariya

March 17, 2016 12:13

Quote:

Originally Posted by pakk (Post 590253)

So, which help do you want? Do you want help in how to make the UDF? Help in getting the UDF that you already made to work? Or just mental support?

ya i need help in making udf. i read whole udf manual but i cant understand how can i make udf.
the only thing i can understand is that i should use 6dof for my work.

pakk	March 18, 2016 06:31

If the Fluent manual is not good enough, how can we help?

I am not saying we can not help, but you should give something to work with... What do you want from us? What did you miss in the manual?

hdariya

March 18, 2016 11:40

Quote:

Originally Posted by pakk (Post 590407)

If the Fluent manual is not good enough, how can we help?

I am not saying we can not help, but you should give something to work with... What do you want from us? What did you miss in the manual?

thanxx for your support
basically i want udf function for my problem which i mention above.

pakk	March 18, 2016 12:08

Write down what the UDF should do.
Break this into smaller and smaller steps.
Do this a few times, until you can not break it down anymore.
In the ends, the steps will be so small that you can translate it to a UDF, and many people here can help with that last part.

Example:
Step 1:

Code:

The UDF should make a cake.

Step 2:

Code:

The UDF should buy ingredients for a cake;

mix them in the right proportions;

and bake the cake in the oven

Step 3:

Code:

The UDF should buy:

  *500 gr. flour,

  *10 eggs,

  *400 gr butter,

  *250 gr sugar.

Then mix the flour with the butter and the sugar,

and add 10 eggs to the mix.

Then put the mix in the baking mold.

Then put the baking mold in the oven,

set the oven to 180 degrees,

and let it wait for 40 minutes,

and then take it out of the oven.

Don't think this is a joke by the way: this is how coding works. Break complex things down, until you are at a level that the computer can understand.

mehrdadkh

May 5, 2016 01:32

I would be grateful if you could send me the box falling into water files.
email:mehrdadkhamooshi@yahoo.com

artemiss1984

October 14, 2016 05:38

Quote:

Originally Posted by Vania (Post 587221)

Hiiii

A useful reference for your problem

http://goo.gl/663zNX

Thanks. but it is passwoed protected. the password is not working

pakk	October 14, 2016 05:59

You are lucky that it did not work. From the post history of Vania, it looks like she/he was trying to get people to download malware.

ehsanakrami

April 16, 2017 11:43

Quote:

Originally Posted by pakk (Post 621502)

You are lucky that it did not work. From the post history of Vania, it looks like she/he was trying to get people to download malware.

Could you please send me the 6dof-mesh.msh.gz and 6dof 2d.c files?
ehsanakrami1@gmail.com
I would be very graceful.

sazeda

June 12, 2017 01:45

Hi, all

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 anyone have?

1) 6dof-mesh.msh.gz
2) 6dof_2d.c

Thansk a lot.
My email: sbsazeda@swr.iitkgp.ernet.in

SJSW	June 29, 2017 06:09

Hi, Config,

I am trying to simulate a leaf falling down the tree.
Is the udf you had posted is sufficient to describe the leaf motion for a six-dof solver? @@
Thank you!

Quote:

Originally Posted by Config (Post 506393)

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

Ivanrips

August 28, 2017 13:35

Tutorial Dynamics Mesh

Hi my friends;
Here I share a tutorial about this topic:
http://cfd.ninja/ansys-fluent/dynamics-mesh/
Regards

samir_cfd

November 25, 2018 15:09

Hi
I am simulating the same case in Fluent but I have a problem, when the ball is close to the free surface the solution diverege (divergence problem) I don't know where is the problem exactly and how to solve it?
Many thanks!!

SJSW	November 27, 2018 06:39

It seems that the dynamic mesh can't touch any wall, but I heard that it has been improved in v19.2 by overset model.

Maybe you set the interface to wall?

samir_cfd

November 27, 2018 14:28

I didn t use any interface. Can I send you my fluent case

SJSW	December 3, 2018 09:34

Had you tried the tutorial shared by Ivanrips?
I think that you can run through the tutorial shared by Ivanrips first and feel the differences between the cases.

a.r.bilal.mtc

March 6, 2019 04:10

Quote:

Originally Posted by Config (Post 506393)

could you please send it to me also
thanks in advance
a.r.bilal.mtc@gmail.com

pakk	March 6, 2019 04:23

Please read this:

Quote:

Originally Posted by pakk (Post 519768)

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

Don't ask strangers to send you files. Get them yourself from a source that you can trust.

a.r.bilal.mtc

March 6, 2019 04:29

Quote:

Originally Posted by pakk (Post 726938)

Please read this:

Don't ask strangers to send you files. Get them yourself from a source that you can trust.

what if I can not get them from the source!

pakk	March 6, 2019 04:36

Then say: "Can anybody tell me where to get the 'projectile moving inside a barrel' pdf? I already looked at ..., but I could not find it there."

You asked Config to send you a pdf. The last time that Config was on this forum was in 2014, do you really expect him to come back to this forum, take the time to find this file from five years ago, and send it to you? That is not a reasonable thing to expect.

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