help about mesh deformation ?
 

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?

Hi Hamed
You need to simulate the model as transient and then use the animation features to see the blade rotation.

BOL

Tassi

hi tassi
u mean animation in ansys cfx pre? or in cfx-post?
how? can u explain a little more?

is there any need for mesh deformation ?:confused:

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

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

tanks for your reply
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)

here are some pic of what i have don to this tankalredy

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

Can't see the images. Can you try posting them again?

sorry!
 

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!

pic
 

tell if any more pic is needed for underestanding the situation


http://www.flickr.com/photos/37458977@N04/?saved=1

can u tell me wich tuterial is similar to my problem?

tanks for your atention t

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

thanks a lot
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.

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