|
[Sponsors] |
|
December 14, 2020, 11:12 |
No Report Files when changing to Transient
|
#1 |
New Member
Join Date: Dec 2020
Posts: 3
Rep Power: 5 |
Hi,
I'm trying to run a transient solution using a previously converged steady-state solution with report files for things like CD, CL, CS, etc. I changed my model, solver settings, and then edited my report-files to set frequency-of to time-step and the itr-index to 626 as my converged solution is set to 625 steps. However, Fluent is not writing anything to these files. I've double checked all of the reports are active and even tried adding completely new report-files and definitions but nothing is being written. I'm not sure if this is an error due to a mismatch between the previous iterations and then switching to a time-step? I don't have it set to flow-time so I would've thought it would carried onto the next iteration as is. Thank you in advance! |
|
December 14, 2020, 23:07 |
|
#2 |
Senior Member
Alexander
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34 |
number 626 means fluent will write to file once each 626 time steps
change 626 to 1, so you will get data on each timestep
__________________
best regards ****************************** press LIKE if this message was helpful |
|
December 15, 2020, 08:51 |
|
#3 |
New Member
Join Date: Dec 2020
Posts: 3
Rep Power: 5 |
||
December 16, 2020, 01:54 |
|
#4 |
Senior Member
Moritz Kuhn
Join Date: Apr 2010
Location: Germany, Dresden
Posts: 207
Rep Power: 17 |
You have to set it to 625 iterations. As you set the iterations per time step to 625, it will never reach 626 and therefore it will not write anything to your data files.
I would recommend to switch to flow-time or time step, in your way you have to ensure, that you have always 625 interations per time step to hit the converged solution, if not you will store the data of the first iteration, which will be nonsens. Due to that fact, it could be possible that option "store every iteration" will not work in transient mode. |
|
December 16, 2020, 09:14 |
|
#5 | |
New Member
Join Date: Dec 2020
Posts: 3
Rep Power: 5 |
Quote:
/solve/report-files edit cl frequency-of time-step itr-index 626 quit For what it's worth, my temporary work around is using the instantaneous values for the forces and making the frequency of my reports equivalent to the number of sub-iterations per time-step, ie if I have it set to sub-iterate 5 times, my report will report every 5th sub-iteration. It reports the data I want but my iterations count by 5. Not ideal but not exactly the end of the world. |
||
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Script/Batch File to obtain transient data from FLUENT Saved Files | SSG_NJ | FLUENT | 0 | November 19, 2020 01:08 |
Could we set up report files for many surfaces at the same time in fluent,for exampl | hitzhwan | FLUENT | 0 | July 16, 2020 12:42 |
Transient boundary conditions changing type over time | LukeFullard | Fluent UDF and Scheme Programming | 0 | August 13, 2012 05:52 |
Creating Transient Graphs using Autosave files from FLUENT | koonalb | FLUENT | 2 | June 3, 2011 03:23 |
Results saving in CFD | hawk | Main CFD Forum | 16 | July 21, 2005 20:51 |