CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Visualize overset mesh movement

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree2Likes
  • 1 Post By me3840
  • 1 Post By Alberto Damas

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 29, 2015, 06:48
Default Visualize overset mesh movement
  #1
Member
 
Alberto
Join Date: Aug 2015
Posts: 31
Rep Power: 11
Alberto Damas is on a distinguished road
Hello, I am trying to simulate a wind turbine using overset mesh and DFBI mode. I want to visualize and record the movement of the turbine during the simulation. ¿How can I do that?
Alberto Damas is offline   Reply With Quote

Old   October 5, 2015, 20:26
Default
  #2
Senior Member
 
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
Create a scene of the thing you would like to see. In the scene properties go to attributes>update and check the save to file option. Configure there how often you would like it to save, and run the simulation.
me3840 is offline   Reply With Quote

Old   October 5, 2015, 20:30
Default
  #3
Senior Member
 
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
Also, if this is a wind turbine, why do you need overset for that? You can just use RBM.
me3840 is offline   Reply With Quote

Old   October 6, 2015, 03:14
Default
  #4
Member
 
Alberto
Join Date: Aug 2015
Posts: 31
Rep Power: 11
Alberto Damas is on a distinguished road
Because I want the wind velocity as an input.

Is there any way to calculate the inertia values for DFBI?

Thx.
Alberto Damas is offline   Reply With Quote

Old   October 6, 2015, 19:22
Default
  #5
Senior Member
 
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
Quote:
Originally Posted by Alberto Damas View Post
Because I want the wind velocity as an input.
Using the freestream velocity as an input and the turbine speed as an output does not require the use of an overset mesh. You can use RBM. RBM will be faster and produce less error than overset. You only need overset for large displacements with complex interactions. A wind turbine just rotates, it's simple.

To find the moment of inertia you need to know the mass distribution of the object, I don't think STAR-CCM+ can calculate it.
Nabuchadresar likes this.
me3840 is offline   Reply With Quote

Old   October 8, 2015, 04:55
Default
  #6
Member
 
Alberto
Join Date: Aug 2015
Posts: 31
Rep Power: 11
Alberto Damas is on a distinguished road
You are right, I thought RBM had the rpm as an input. Thx a lot.

I have simulated the same geometry changing some parameters: wind velocity, inicial inertia values (I don't know what this means) and DFBI object mass. None of them change the rpm obtained. Do you know what I am doing wrong?
Nabuchadresar likes this.
Alberto Damas is offline   Reply With Quote

Old   October 8, 2015, 15:44
Default
  #7
Senior Member
 
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
Make sure the region that rotates has its motion set to 'DFBI rotation and translation' and only enable rotating in 1 direction.

If you don't know what the inertia values are, you need to take a step back and read about some basic rotational kinematics, you shouldn't be doing this problem yet.
https://en.wikipedia.org/wiki/Moment_of_inertia
me3840 is offline   Reply With Quote

Old   March 19, 2016, 13:20
Default
  #8
Member
 
André Luiz Moura Silva Moreira
Join Date: Apr 2015
Location: Brazil
Posts: 40
Rep Power: 11
Nabuchadresar is on a distinguished road
Quote:
Originally Posted by Alberto Damas View Post
You are right, I thought RBM had the rpm as an input. Thx a lot.

I have simulated the same geometry changing some parameters: wind velocity, inicial inertia values (I don't know what this means) and DFBI object mass. None of them change the rpm obtained. Do you know what I am doing wrong?
You found the problem?
Nabuchadresar is offline   Reply With Quote

Old   March 21, 2016, 07:31
Default
  #9
Member
 
Alberto
Join Date: Aug 2015
Posts: 31
Rep Power: 11
Alberto Damas is on a distinguished road
Yes, I don't remember what I did wrong but it works now.
Alberto Damas is offline   Reply With Quote

Reply

Tags
dfbi, movement, overset, visualize

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
sliding mesh problem in CFX Saima CFX 46 September 11, 2021 07:38
Overset Mesh Cell Count Kishen STAR-CCM+ 0 April 18, 2014 04:23
Wedge water impact DFBI Overset mesh jcamilleri STAR-CCM+ 1 March 31, 2014 12:58
[ICEM] Mesh Decoupled Mesh Movement in ICEM Julian K. ANSYS Meshing & Geometry 0 October 26, 2011 16:06
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 11:55


All times are GMT -4. The time now is 14:48.