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April 15, 2009, 04:38 |
help about mesh deformation ?
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#1 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
hi everyone
i have successfully modeled a mixing tank and its rotating blade but can u tell me ( how can i see the rotation of the rotating wall(blade) visible in cfx-post ?) i mean i need to see how can i have that defined rotating wall animated in cfx-post? all i have here (in cfx-post) is an stationary blade that has no motion and i am really confused! should i define mesh deformation or something? please tell me what do i need? |
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April 15, 2009, 06:31 |
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#2 |
New Member
Tassi
Join Date: Mar 2009
Location: Mumbai, India
Posts: 11
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Hi Hamed
You need to simulate the model as transient and then use the animation features to see the blade rotation. BOL Tassi |
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April 15, 2009, 10:25 |
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#3 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
hi tassi
u mean animation in ansys cfx pre? or in cfx-post? how? can u explain a little more? |
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April 15, 2009, 10:33 |
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#4 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
is there any need for mesh deformation ?
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April 15, 2009, 18:34 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,729
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Hi,
As hamed said - if the blade rotates it will be much better to simulate it using a rotating frame of reference rather than deforming mesh. Why are you using deforming mesh? Glenn Horrocks |
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April 16, 2009, 00:29 |
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#6 |
New Member
Tassi
Join Date: Mar 2009
Location: Mumbai, India
Posts: 11
Rep Power: 17 |
Hi
No you wont have to use deforming mesh. Animation can be done in CFX-Post. Transient simulation and Animations are covered in CFX tutorials. BOL |
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April 16, 2009, 04:26 |
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#7 | |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
Quote:
do u mean that i need to model the blade and the tank together and then define 2 domain?all i alredy have is a tank that the blade is cuted out of that and i defined a fluid domain so defined a rotating wall boundry that contains the blade and a stationary wall boundry that contains the tank,s wall can u explaine how can i have a rotating frame ?(i am new to cfx) |
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April 16, 2009, 04:32 |
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#8 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
here are some pic of what i have don to this tankalredy
Last edited by hmasenger; April 16, 2009 at 04:59. |
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April 16, 2009, 08:24 |
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#9 |
New Member
Tassi
Join Date: Mar 2009
Location: Mumbai, India
Posts: 11
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Hi
I guess you forgot to post the pics. There is a specific tutorial in CFX for you problem. That would help you immensly. BOL |
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April 16, 2009, 08:28 |
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#10 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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Can't see the images. Can you try posting them again?
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April 16, 2009, 12:49 |
sorry!
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#11 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
i have forgotten to send the pics link
so that it http://www.flickr.com/photos/37458977@N04/?saved=1 i am waiting for your friendly guidence by the way, i will be glad to have chat with u ,if you have time of course! thous (hmasenger)is my yahoo id thanks again! |
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April 16, 2009, 12:52 |
pic
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#12 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
tell if any more pic is needed for underestanding the situation
http://www.flickr.com/photos/37458977@N04/?saved=1 |
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April 16, 2009, 14:03 |
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#13 |
Senior Member
hamed
Join Date: Apr 2009
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April 16, 2009, 18:19 |
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#14 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,729
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Can you describe how it works? I assume the impeller rotates and the big tank is stationary. In that case cut a cylinder around the impeller and put the impeller in a rotating frame of reference, the tank in a stationary frame of reference. Connect them with a GGI.
Glenn Horrocks |
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April 17, 2009, 07:21 |
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#15 | |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
Quote:
i think i have got what you mean >>! i modeled the problem again and solved that whit a rotating domain which is a cylender that the blade is cuted out of that but steal i cant see the motion in cfx-post this is a tank which has a to plade impller that rotats whith speed of 15 rpm and i need to sudy the dissipation of water affected by the impller here i have put the link of new pics and an animation http://www.flickr.com/photos/37458977@N04/tags/rotating/ and i send a new thread in the forum take a look at that. |
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April 17, 2009, 07:33 |
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#16 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,729
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Hi,
That's more like it. Have a look at the tutorial examples, especially the rotating frame of reference ones - there is a turbine one and might be some others (don't have CFX in front of me so can't be sure). Also consider whether a frozen rotor approach is adequate for you. If it is it will save heaps of time. Otherwise a full transient rotor/stator is required and that can take ages. Glenn Horrocks |
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