[DonQuijote]

Hi all,

Hi am unexperienced in UDF compiling. So I'd like to show you my case and hope to receive some help...

I want to move the hole I have in my domain as shown in the picture attached. For that, I suppose to make an UDF as follows:

# include "udf.h"
# include "dynamesh_tools.h"
*************HOle Movement**************************
DEFINE_CG_MOTION(holemov, dt, vel, omega, time, dtime)
{
Thread *t;
face_t f;
vel[1]=40;
}

So the walls of the hole have a constant speed of 40 m/s. I know that I miss some things in the UDF, but as the case is quite simple, it is sure that there is somebody that could help me...

Thank you for your help!!!

[phanh]

Originally Posted by DonQuijote

Hi all,

Hi am unexperienced in UDF compiling. So I'd like to show you my case and hope to receive some help...

I want to move the hole I have in my domain as shown in the picture attached. For that, I suppose to make an UDF as follows:

# include "udf.h"
# include "dynamesh_tools.h"
*************HOle Movement**************************
DEFINE_CG_MOTION(holemov, dt, vel, omega, time, dtime)
{
Thread *t;
face_t f;
vel[1]=40;
}

So the walls of the hole have a constant speed of 40 m/s. I know that I miss some things in the UDF, but as the case is quite simple, it is sure that there is somebody that could help me...

Thank you for your help!!!

Hi,

Tell me exactly which problem are you facing with your UDF code? I may help you

[DonQuijote]

Thank you phanh for your interest. I have tested the UDF and it seems to do what I wanted (to move the hole in one direction). So the problem is solved and the dynamic mesh not produces any.

But thank you again
Regards

[627680136]

Originally Posted by DonQuijote

Hi all,

Hi am unexperienced in UDF compiling. So I'd like to show you my case and hope to receive some help...

I want to move the hole I have in my domain as shown in the picture attached. For that, I suppose to make an UDF as follows:

# include "udf.h"
# include "dynamesh_tools.h"
*************HOle Movement**************************
DEFINE_CG_MOTION(holemov, dt, vel, omega, time, dtime)
{
Thread *t;
face_t f;
vel[1]=40;
}

So the walls of the hole have a constant speed of 40 m/s. I know that I miss some things in the UDF, but as the case is quite simple, it is sure that there is somebody that could help me...

Thank you for your help!!!

hi,I'd like to know how you solve the problem,thank you!!!

[ghost82]

Originally Posted by 627680136

hi,I'd like to know how you solve the problem,thank you!!!

vel[1] moves in y direction; looking at the picture DonQuijote wants to move the object in +- x direction, so he must use vel[0]; supposing you want to move the object with constant 40 m/s velocity in +x direction you have to write vel[0]=40;

Daniele

[DonQuijote]

Sorry, I forgot this post since I finally didn't develop so much the model.

What ghost82 comments is totally right! I had to change the direction of velocity to vel[0] (when I first began the thread I didin't know what [1] means...). Since I only wanted to move in one direction (x+), vel[0]=40.

Regards

[627680136]

Originally Posted by ghost82

vel[1] moves in y direction; looking at the picture DonQuijote wants to move the object in +- x direction, so he must use vel[0]; supposing you want to move the object with constant 40 m/s velocity in +x direction you have to write vel[0]=40;

Daniele

thank you! I got it

[627680136]

Originally Posted by DonQuijote

Sorry, I forgot this post since I finally didn't develop so much the model.

What ghost82 comments is totally right! I had to change the direction of velocity to vel[0] (when I first began the thread I didin't know what [1] means...). Since I only wanted to move in one direction (x+), vel[0]=40.

Regards

Thank you very much for your answer!