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

How to use PatchBC

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 28, 2022, 04:51
Default
  #21
Member
 
Felix S.
Join Date: Feb 2021
Location: Germany, Braunschweig
Posts: 88
Rep Power: 6
Felix_Sp is on a distinguished road
Hello,

since I am also interested in the PatchBC I tested some stuff with 22.03.

Mainly, I am interested in the prescriptions of water depth.

So I tried B 413, B 418 and B 422 with the test case that was provided with B 441 1 4 0.55 0.65 0.25 0.35 0.25 0.35, the rectangular patch description.

For B 418 1 1: I see nothing happening in the simulation.
For B 413 1 0.35 and For B 422 1 1 I see the water level changing on the boundary, but no in- or outflow (also see the picture, the velocity is nearly at zero everywhere). Maybe I am just using it wrong, but I thought the velocity would then be prescribed by a gradient of zero.

I have attached the control files, the hydrograph_FSF_1.dat (just some arbitrary sinusoidal wave with h=0.3\pm0.05) and an example picture of the water depth.

Thanks for the explanations in advance!
Attached Images
File Type: jpg patchBC.jpg (25.8 KB, 16 views)
Attached Files
File Type: zip control_files.zip (1.3 KB, 6 views)
Felix_Sp is offline   Reply With Quote

Old   March 28, 2022, 07:08
Default
  #22
Super Moderator
 
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 403
Rep Power: 19
valgrinda is on a distinguished road
Hello Felix,

yes, you also need to describe the velocities. Either directly or through the current input. I guess you want to run this for waves? There will be a patchBC implementation for waves very soon. The focus there will be on multiple wave generation locations with each having their own wave input.
__________________
Hans Bihs
Team REEF3D
www.reef3d.com
valgrinda is offline   Reply With Quote

Old   March 28, 2022, 07:40
Default
  #23
Member
 
Felix S.
Join Date: Feb 2021
Location: Germany, Braunschweig
Posts: 88
Rep Power: 6
Felix_Sp is on a distinguished road
Okay, thanks for the clarification on the velocity prescription! Yeah, wanted to try whether this works for waves. Looking forward to the implementation in the future!


Thanks for your work!
Felix_Sp is offline   Reply With Quote

Reply


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
Reef3d 21.05 valgrinda REEF3D News & Announcements 0 June 1, 2021 16:42


All times are GMT -4. The time now is 12:46.