CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > REEF3D

Problems with the moorings and generating Irregular waves

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 21, 2022, 01:09
Default Problems with the moorings and generating Irregular waves
  #1
New Member
 
B
Join Date: Dec 2022
Posts: 2
Rep Power: 0
borjaba97 is on a distinguished road
Good morning!

I have some issues with the input of the moorings (Quasi-static).
I place all the parameters as it is said in the REEF3D user guide, but when I run it, it gives an error in the velocity (exceeding maximum velocity). Also, when I plot it in ParaView during the first time step the velocity under the floating object is extremely high.
I let you here the ctr and control files to see if someone could help me.
control (moorings).txt
ctrl (moorings).txt

The other problem I have is during the creation of irregular waves, at some point the program gives an error and if you plot it in ParaView the velocities are also extremely high.
I let also the ctr and control file here
ctrl (IrregularWaves).txt
control (IrregularWaves).txt

I've trying for a long time, and I cannot find the error.

Thank you very much!!
borjaba97 is offline   Reply With Quote

Old   January 12, 2023, 04:57
Default
  #2
Senior Member
 
Arun Kamath
Join Date: Nov 2014
Location: Trondheim, Norway
Posts: 265
Rep Power: 13
kamath is on a distinguished road
There are a few ways to troubleshoot this.
My advice (for both cases) would be to first ensure that your NWT is in fact capable of generating the waves that you need.
I notice that you use side wall C 12 21 C 13 21 for a 2D case (only one cell in the y-direction). This will firstly cause very high constriction on the flow.

Since you have an NWT that is only one cell wide, you should use the symmetry conditions on the side walls C 12 3 C 13 3. This could already solve your problem.
However, also look a smaller wave tank first to confirm the appropriate grid size that might be required to properly represent your waves, before you move on to bigger domains and complex structures.
__________________
Arun
X years with REEF3D
kamath is offline   Reply With Quote

Reply

Tags
floating body, irregular waves, moorings

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



All times are GMT -4. The time now is 17:23.