|
[Sponsors] |
June 22, 2016, 08:39 |
Defining Planetary Motion
|
#1 |
New Member
Arun Sreyas
Join Date: Jun 2016
Posts: 4
Rep Power: 10 |
Hello everyone,
I have been facing a problem in defining the rotation of a body in CFX. I want to define a planetary motion to a body (a body rotating at a fixed radius from the center, the body can be larger than the radius of rotation). I don't find any option to define such a motion in CFX. I tried defining its rotation under the domain tab in the setup page. Domain Models -> Option -> Rotating. However I'm getting a purely rotating motion about the center. I do not want the object to be changing its orientation. I just want it to move in a circular path. Please help me with this, thank you! |
|
June 22, 2016, 09:17 |
|
#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,868
Rep Power: 144 |
Define the body in a rotating frame of reference (where the rotation axis is not necessarily through the body), and set the wall boundaries on the body to counter-rotating.
|
|
June 24, 2016, 03:26 |
|
#3 |
New Member
Arun Sreyas
Join Date: Jun 2016
Posts: 4
Rep Power: 10 |
I have a stationary body as well, alongside the body in planetary motion. Also I can't set the wall to be rotating, as the enclosure is like a water tank, with outlet on the wall.
|
|
June 24, 2016, 07:31 |
|
#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,868
Rep Power: 144 |
Can you post an image of what you are modelling and describe what is happening and where?
|
|
June 24, 2016, 07:47 |
|
#5 |
New Member
Arun Sreyas
Join Date: Jun 2016
Posts: 4
Rep Power: 10 |
Sure, PFA
Top View.png Iso View.png There are two scrolls, one rotating and one stationary. The inlet to the gas (smaller radius) is at the top and outlet (larger radius) is on the side wall of the enclosures. Alternately, check out this YouTube video, to understand the kind of rotation I'm trying to achieve. https://www.youtube.com/watch?v=iU5PVinDyNQ Thanks a lot for your help! |
|
June 24, 2016, 07:52 |
|
#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,868
Rep Power: 144 |
I can only see two choices to model this motion: immersed solids or dynamic remeshing. You cannot model this by rotating frames of reference.
|
|
June 25, 2016, 10:14 |
|
#7 |
New Member
Arun Sreyas
Join Date: Jun 2016
Posts: 4
Rep Power: 10 |
Thanks once again.
Could you provide with any links of tutorials of dynamic meshing. A lot of content is on dynamic meshing in ANSYS Fluent, but I am not able to find any good resource/tutorial for ANSYS CFX dynamic meshing. |
|
June 25, 2016, 21:55 |
|
#8 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,868
Rep Power: 144 |
The immersed solid approach is MUCH easier and I recommend you try that before you go for dynamic remeshing.
I think the dynamic remeshing tutorials are on the ANSYS community webpage. |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Modelling a planetary motion mixer | alextimon | ANSYS | 0 | January 28, 2016 10:39 |
External management of solid motion (using dynamicmesh) | maxou1993 | Main CFD Forum | 0 | July 28, 2015 12:37 |
Moving mesh | Niklas Wikstrom (Wikstrom) | OpenFOAM Running, Solving & CFD | 122 | June 15, 2014 07:20 |
Problem in defining motion to the body externally ! | OE11S007 | STAR-CCM+ | 1 | March 8, 2014 00:32 |
Defining dynamic zones for Define CG motion | aamer | Main CFD Forum | 0 | March 21, 2011 04:51 |