CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

CFX+ANSYS Transient for water entry of elastic plate

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 28, 2012, 12:16
Question CFX+ANSYS Transient for water entry of elastic plate
  #1
New Member
 
Join Date: Nov 2012
Location: China
Posts: 3
Rep Power: 4
SteelMan is on a distinguished road
Send a message via Skype™ to SteelMan
Hi, I plan to simulate an elastic plate impacting into water using CFX+Ansys Transient. It is a two way FSI problem. I am not sure they can work. The plate has a initial velosity and acceleration. The fluid domain includes water and air. My questions are :

1) Because the plate has motions, do I have to use remeshing function of CFX?
2) Could I get wet model of the plate?

3) I finished a model test for the problem. I found that the air is captured into the water. There are some air bubles in the local fluid field under the plate surface. Actually it is a two phase flow problem. Can the CFX fit my expectation?

4) Is the free surface of fluid domain acceptable? Lots of people say the FVM is not good at this.

Any suggestion is greatly appreciated.

Thanks,
Steelman

Last edited by SteelMan; November 28, 2012 at 21:10. Reason: wrong SPELL
SteelMan is offline   Reply With Quote

Old   November 28, 2012, 16:34
Default
  #2
Senior Member
 
Bruno
Join Date: Mar 2009
Location: Brazil
Posts: 236
Rep Power: 12
brunoc is on a distinguished road
Hi there,

1. You'll only have to use remeshing if your elements get too much distorted. If you start your simulation with the plate near the water surface level and it does not go too deep into the water, you should be ok with one mesh alone and some tricks on the moving mesh side.

2. I don't understand what you want here. Could you explain it a little further?

3. Yes, CFX can model free surface with bubble entrainment. If you are not focusing on the bubble entrainment behaviour, the homogeneous model should get you good enough results.

4. Yes, it should be good enough.

Cheers
brunoc is offline   Reply With Quote

Old   November 28, 2012, 20:59
Default
  #3
New Member
 
Join Date: Nov 2012
Location: China
Posts: 3
Rep Power: 4
SteelMan is on a distinguished road
Send a message via Skype™ to SteelMan
Many thanks, brunoc.
sorry for confuse. For the 'wet model' , I want to know the natural periods of plate vibration with one side touching water. Maybe I used wrong words, 'mode', 'modal','model', sorry for that.
SteelMan is offline   Reply With Quote

Reply

Tags
air bubble, cfx ansys fsi, flat plated, water entry

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
ANSYS CFX with Remeshing in ICEM CFD adeban CFX 13 April 10, 2015 14:32
Setting Pressure Boundary Conditions in ANSYS CFX Pre saisanthoshm88 CFX 19 April 26, 2014 20:36
Transient animation performance in CFX 5.5 POST Sjoerd Romkes CFX 8 February 5, 2013 15:53
ANSYS Multi-physics and CFX coupling error anujit CFX 3 June 21, 2009 18:39
I cannot open Ansys CFX in Workbench Pham Son Minh CFX 2 January 13, 2008 04:33


All times are GMT -4. The time now is 09:05.