# General moving object in water

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 March 22, 2020, 06:49 General moving object in water #1 New Member   MAI THI LOAN Join Date: Mar 2020 Location: Korea Posts: 6 Rep Power: 2 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.

 April 2, 2020, 19:55 #2 Senior Member   Adwaith Gupta Join Date: Dec 2015 Location: India, USA Posts: 116 Blog Entries: 1 Rep Power: 6 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.

 April 3, 2020, 01:38 #3 New Member   MAI THI LOAN Join Date: Mar 2020 Location: Korea Posts: 6 Rep Power: 2 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.

 April 10, 2020, 16:49 #4 Senior Member   Adwaith Gupta Join Date: Dec 2015 Location: India, USA Posts: 116 Blog Entries: 1 Rep Power: 6 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.

 April 14, 2020, 21:06 #5 New Member   MAI THI LOAN Join Date: Mar 2020 Location: Korea Posts: 6 Rep Power: 2 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.

 Thread Tools Search this Thread Search this Thread: Advanced Search Display Modes Linear Mode

 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 OffTrackbacks are Off Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Helium FLUENT 0 July 3, 2019 10:20 visitor Fluent Multiphase 0 December 4, 2014 07:42 Prosper OpenFOAM 2 February 25, 2014 18:00 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.

 Contact Us - CFD Online - Privacy Statement - Top