CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > FLOW-3D

General moving object in water

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

Like Tree3Likes
  • 1 Post By thunde47
  • 2 Post By mailoan2306

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 22, 2020, 06:49
Post General moving object in water
  #1
New Member
 
MAI THI LOAN
Join Date: Mar 2020
Location: Korea
Posts: 6
Rep Power: 2
mailoan2306 is on a distinguished road
Hi, everyone!

I am a new member of this forums.
I am doing a project relative to GMO in flow 3D and I am studying flow 3D software several weeks ago.
My target is cylinder rolling in water with sand, rock, or mud in bottom based on current speed
My question is what are the kinds of physical I have to use? and How can I set up for boundary conditions to obtain the target?
I hope to receive your advice.
Thank you in advance.
mailoan2306 is offline   Reply With Quote

Old   April 2, 2020, 19:55
Default
  #2
Senior Member
 
Adwaith Gupta
Join Date: Dec 2015
Location: India, USA
Posts: 116
Blog Entries: 1
Rep Power: 6
thunde47 is on a distinguished road
The main model here will be the GMO model. You can either just do one-way coupling where the cylinder affects the fluid or a two-way coupling where both fluid and cylinder affect each other.

The boundary conditions will depend on the type of water body your cylinder is in. If its a pool of water, with nothing moving in and out, then symmetry or wall BC will work.
mailoan2306 likes this.
thunde47 is offline   Reply With Quote

Old   April 3, 2020, 01:38
Post
  #3
New Member
 
MAI THI LOAN
Join Date: Mar 2020
Location: Korea
Posts: 6
Rep Power: 2
mailoan2306 is on a distinguished road
Thank you for your reply.

The cylinder is located in the water tank and it stationary in the position in calm water.
However, my simulation is cylinder rolling due to flow speed, so how can I setup characteristic of GMO? is it need translational velocity in space system and angular velocity in body system or I just input velocity at Specified velocity in boundary condition?
Please help me with this problem.
Thank you so much.
mailoan2306 is offline   Reply With Quote

Old   April 10, 2020, 16:49
Default
  #4
Senior Member
 
Adwaith Gupta
Join Date: Dec 2015
Location: India, USA
Posts: 116
Blog Entries: 1
Rep Power: 6
thunde47 is on a distinguished road
If you activate the two-way coupling in GMO model, then water will just roll the cylinder along.

Now, in order to assign velocity to the fluid, you can provide velocity at the boundary condition.
thunde47 is offline   Reply With Quote

Old   April 14, 2020, 21:06
Default
  #5
New Member
 
MAI THI LOAN
Join Date: Mar 2020
Location: Korea
Posts: 6
Rep Power: 2
mailoan2306 is on a distinguished road
I am so sorry, please describe in the more detail about the motion of the cylinder. Where can I active the 2-way coupling motion? and In moving object properties, how can I define constraints (How can I set up the motion? type of moving object is prescribed motion or coupled motion, should I using 6DOF or fixed any axis and initial/prescribed velocity in space system and body system?
elyasmin and amuca45 like this.
mailoan2306 is offline   Reply With Quote

Reply

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
Moving tank in the water? Helium FLUENT 0 July 3, 2019 10:20
Simulating a body (boat) moving on water visitor Fluent Multiphase 0 December 4, 2014 07:42
Moving contact line on solid object, OpenFoam Prosper OpenFOAM 2 February 25, 2014 18:00
Compilation error OF1.5-dev on Suse10.3 darenyang OpenFOAM Installation 0 April 29, 2009 04:55
[blockMesh] BlockMeshmergePatchPairs hjasak OpenFOAM Meshing & Mesh Conversion 11 August 15, 2008 07:36


All times are GMT -4. The time now is 09:08.