Stop and Restart Solver

rere · February 17, 2016, 07:30

Hiya

How do I stop and restart a solver?

Working on 1000 iterations and waiting for graph to show convergence, which is all taking so much time!

Thanks

-Maxim- · February 17, 2016, 11:34

hit the stop button in solver manager and wait until the current time step is finished and the result file (*.res) is written to your hard drive.

to restart, select the result file from the stopped calculation as "Initial Values".

Opaque · February 17, 2016, 12:14

or press the Continue arrow on the Solver Manager toolbar.

rere · February 17, 2016, 12:24

Quote:

Originally Posted by -Maxim-

hit the stop button in solver manager and wait until the current time step is finished and the result file (*.res) is written to your hard drive.

to restart, select the result file from the stopped calculation as "Initial Values".

okay, once I've closed and exited Ansys....what are the exact steps to restart?

Ta

-Maxim- · February 18, 2016, 03:11

http://lmgtfy.com/?q=restart+solver+run+cfx

the second link leads to
ANSYS CFX-Solver Manager User's Guide

You press ctrl+f and search for 'restart'.

rere · February 18, 2016, 05:07

Quote:

Originally Posted by -Maxim-

http://lmgtfy.com/?q=restart+solver+run+cfx

the second link leads to
ANSYS CFX-Solver Manager User's Guide

You press ctrl+f and search for 'restart'.

I had tried this with a previous simulation but the iteration count mentioned on the screen and the graph didn't match. The graph was showing UPTO 80 iterations and the solver had reached 321 at the time.

-Maxim- · February 18, 2016, 06:03

I would guess you had your graph set to display 'this run only' or some fixed number of iterations and the out file showed the total number of iterations. It usually shows 'number of iterations of THIS run' in () right below it.

rere · February 18, 2016, 07:09

Quote:

Originally Posted by -Maxim-

I would guess you had your graph set to display 'this run only' or some fixed number of iterations and the out file showed the total number of iterations. It usually shows 'number of iterations of THIS run' in () right below it.

In the Solver Control, I had iterations fixed --> min:1 and max: 1000 iterations, but I'd stopped it at 80 and when I attempted restart, it only showed the graph at 80 (not beyond) - however, the iteration continued. So, the graph and solver were not in sync

-Maxim- · February 18, 2016, 07:15

can you provide screenshots of that? And the settings of the monitors? I am sure that this is just a problem with the settings of the monitors and/or the monitored variables.

rere · February 18, 2016, 08:54

Quote:

Originally Posted by -Maxim-

can you provide screenshots of that? And the settings of the monitors? I am sure that this is just a problem with the settings of the monitors and/or the monitored variables.

This is another simulation, that hasn't yet been stopped but it shows you the graph to the left and the solving on the right.

The stopped simulation doesn't show that both are in sync (can't open that simulation, i DAREN'T STOP THIS ONE).

Regarding the settings (again, can't take screenshots) but these are the only steps:

Setup > Insert > Solver > Solver Control > Basic Settings > Convergence control > Maximum Iterations > 1000 > Convergence Criteria > Residual Target > 1e-5 > Apply > Close

-Maxim- · February 18, 2016, 09:04

I am not talking about your convergence control settings, I am talking about the monitor settings. Right-click on the monitor (graph) and go to 'monitor properties'.

rere · February 18, 2016, 09:26

Quote:

Originally Posted by -Maxim-

I am not talking about your convergence control settings, I am talking about the monitor settings. Right-click on the monitor (graph) and go to 'monitor properties'.

Please see attached

-Maxim- · February 18, 2016, 09:28

yeah, that would now be interesting for the monitors that were/are 'out of sync'. Take your time, finish your current simulation and then try to restart the other one again and check if your sync problem still exists.

rere · March 3, 2016, 05:53

Quote:

Originally Posted by -Maxim-

yeah, that would now be interesting for the monitors that were/are 'out of sync'. Take your time, finish your current simulation and then try to restart the other one again and check if your sync problem still exists.

still exists.

-Maxim- · March 3, 2016, 06:04

some more information would be nice.
Which setting did you use in the define run - initial values window?

February 17, 2016, 07:30	Stop and Restart Solver	#1
rere New Member re Join Date: Nov 2015 Posts: 20 Rep Power: 11	Hiya How do I stop and restart a solver? Working on 1000 iterations and waiting for graph to show convergence, which is all taking so much time! Thanks

February 18, 2016, 03:11		#5
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	http://lmgtfy.com/?q=restart+solver+run+cfx the second link leads to ANSYS CFX-Solver Manager User's Guide You press ctrl+f and search for 'restart'. Last edited by -Maxim-; February 18, 2016 at 03:12. Reason: link

February 18, 2016, 06:03		#7
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	I would guess you had your graph set to display 'this run only' or some fixed number of iterations and the out file showed the total number of iterations. It usually shows 'number of iterations of THIS run' in () right below it. Last edited by -Maxim-; February 18, 2016 at 06:03. Reason: .

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February 17, 2016, 11:34		#2
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	hit the stop button in solver manager and wait until the current time step is finished and the result file (*.res) is written to your hard drive. to restart, select the result file from the stopped calculation as "Initial Values".

February 17, 2016, 12:14		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,880 Rep Power: 33	or press the Continue arrow on the Solver Manager toolbar.

February 18, 2016, 07:15		#9
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	can you provide screenshots of that? And the settings of the monitors? I am sure that this is just a problem with the settings of the monitors and/or the monitored variables.

February 18, 2016, 09:04		#11
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	I am not talking about your convergence control settings, I am talking about the monitor settings. Right-click on the monitor (graph) and go to 'monitor properties'.

February 18, 2016, 09:28		#13
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	yeah, that would now be interesting for the monitors that were/are 'out of sync'. Take your time, finish your current simulation and then try to restart the other one again and check if your sync problem still exists.

March 3, 2016, 06:04		#15
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	some more information would be nice. Which setting did you use in the define run - initial values window?