adjusting the maxCo during solution

maksjood · June 9, 2018, 07:26

Hi. I want for the maxCo to change within the solve due to some criterion. How that can be done?

I already tried just simply assigning a value to it with a line

maxCo=something;

within the .C file; but it didn't work.

piu58 · June 9, 2018, 12:21

You have to set it in system/controlDict

The line

Code:

writeControl    adjustableRunTime;

allows changes during runtime, and you may set the value in the line

Code:

maxCo           0.3;

to something different while the simulation is running.

It is often useful to start with a low value vor maxCo and inreasing it, when the simulated flow gets stable.

maksjood · June 10, 2018, 05:30

Thanks; but I need it to change programmatically (not by me). As you mentioned, I want it to increase and decrease duo to some criteria.

June 9, 2018, 07:26	adjusting the maxCo during solution	#1
maksjood New Member javad haqqani Join Date: Dec 2017 Posts: 16 Rep Power: 8	Hi. I want for the maxCo to change within the solve due to some criterion. How that can be done? I already tried just simply assigning a value to it with a line maxCo=something; within the .C file; but it didn't work.

June 9, 2018, 12:21		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	You have to set it in system/controlDict The line Code: writeControl adjustableRunTime; allows changes during runtime, and you may set the value in the line Code: maxCo 0.3; to something different while the simulation is running. It is often useful to start with a low value vor maxCo and inreasing it, when the simulated flow gets stable. maksjood likes this. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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June 10, 2018, 05:30		#3
maksjood New Member javad haqqani Join Date: Dec 2017 Posts: 16 Rep Power: 8	Thanks; but I need it to change programmatically (not by me). As you mentioned, I want it to increase and decrease duo to some criteria.