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

Issues with using state files for sediment transport

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes
  • 1 Post By valgrinda

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 8, 2022, 15:02
Default Issues with using state files for sediment transport
  #1
New Member
 
Orrin
Join Date: Dec 2020
Posts: 5
Rep Power: 6
Orrin is on a distinguished road
Hi,

I was wondering if anyone had encountered issues whilst trying to solve a sediment transport problem in REEF3D, using state files to enable benchmarking.

I used the I 40 and P 40 commands. The first simulation appeared to run fine and saved the state file folder. The second simulation successfully started running, but I noticed some issues with the 'Max Sediment Erosion' and 'Sediment Line' outputs.

The last sediment line reference for the first simulation is named '...._x-152770.dat'. This sediment line shows some sediment erosion as expected. The first 'sediment line' output from the second simulation is also labeled 152770 and shows the same erosion - which is as expected. However the following sediment line output from the second simulation (ref. 152780 in my case) returns to the initial sediment bed with zero erosion. This means that the second simulation does not appear to be using the previously benchmarked sediment bed, and is effectively just rerunning the original simulation.

Is there a known fix for this issue?

Thanks,
Orrin
Orrin is offline   Reply With Quote

Old   March 11, 2022, 04:52
Default
  #2
Super Moderator
 
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 403
Rep Power: 19
valgrinda is on a distinguished road
Hi Orrin,

I will have a look and fix it for the next RC.
Orrin likes this.
__________________
Hans Bihs
Team REEF3D
www.reef3d.com
valgrinda is offline   Reply With Quote

Old   March 17, 2022, 14:03
Default
  #3
Super Moderator
 
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 403
Rep Power: 19
valgrinda is on a distinguished road
Hi Orrin,

I have tried restart for sediment. I cannot confirm your problem. For me the simulation continues as it should. I use the VTU files to check this.
__________________
Hans Bihs
Team REEF3D
www.reef3d.com
valgrinda is offline   Reply With Quote

Old   March 17, 2022, 14:36
Default
  #4
New Member
 
Orrin
Join Date: Dec 2020
Posts: 5
Rep Power: 6
Orrin is on a distinguished road
Quote:
Originally Posted by valgrinda View Post
Hi Orrin,

I have tried restart for sediment. I cannot confirm your problem. For me the simulation continues as it should. I use the VTU files to check this.
Hi Hans,

I only print the .VTU files at the end of my simulation (due to large file size), but the sediment line profiles suggest the sediment bed reset to the initial state after the first iteration.

I've just looked closely at the recent updates in GitHub and wonder if this could be due to the REEF3D version I am using. I was running V21.05 (for consistency of comparison with other simulations I've executed), and note in the update notes for V21.10 it states "x hot start support added (and working now) for sediment transport (CFD)".

Thanks,
Orrin
Orrin is offline   Reply With Quote

Old   March 18, 2022, 04:16
Default
  #5
Super Moderator
 
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 403
Rep Power: 19
valgrinda is on a distinguished road
Hi Orrin,

yes, that is the problem. Please keep in mind to always use the newest version.
__________________
Hans Bihs
Team REEF3D
www.reef3d.com
valgrinda 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
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 07:27
UDF issue MASOUD Fluent UDF and Scheme Programming 14 December 6, 2012 14:39
[OpenFOAM] Reuse state for different simulations reread input files axl ParaView 2 July 11, 2008 13:05
Thermal and species transport in steady state mrangitschdowcom OpenFOAM Running, Solving & CFD 3 October 10, 2007 06:21
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 13:02


All times are GMT -4. The time now is 00:41.