Problems with openLabs

Hi

The expression in Pascal is correct except that "." needs to be removed from the end of the line.

If that does not work, we need more information:

Which version are you using? Fidelity 2022.2?

On which OS version are you running?

If Linux: which gcc version?

Please confirm whether you are using line breaks and if so that they are used consistently? Or did you put all in one line?

What exactly is the error message? Is there more detail in the log?

Best regards,
Colinda

I am now made on an interesting context. When the sizes were given in bar and the coefficients were correspondingly small, there was no error message at all during the simulation. When the function in Pascal and coefficients and numbers became very large the simulation did not run.  Therefore I have thought that it can be because of numbers which are possibly simply too large, but I do not understand why this should be so. For example, I could never exceed the limit of 15 terms, but now I have taken 20 terms. And individual values that are a little larger are reduced and multiplied by 1e1 as you will see in the functions. And now the simulation runs with 20 terms.
The following 1st function is unprocessed and the 2nd function is processed with 1e1 and does not cause any problems with the simulation: 

1650.4065 + (-112.848)*cos(1.963*tCoord + 2*PI*Time/timePeriod) + (4.398)*sin(1.963*tCoord + 2*PI*Time/timePeriod) + (-34.2)*cos(3.927*tCoord + 2*PI*Time/timePeriod) + (80.262)*sin(3.927*tCoord + 2*PI*Time/timePeriod) + (69.031)*cos(5.890*tCoord + 2*PI*Time/timePeriod) + (-24.899)*sin(5.890*tCoord + 2*PI*Time/timePeriod) + (-15.064)*cos(7.854*tCoord + 2*PI*Time/timePeriod) + (-23.672)*sin(7.854*tCoord + 2*PI*Time/timePeriod) + (-27.692)*cos(9.817*tCoord + 2*PI*Time/timePeriod) + (6.149)*sin(9.817*tCoord + 2*PI*Time/timePeriod) + (15.507)*cos(11.781*tCoord + 2*PI*Time/timePeriod) + (18.800)*sin(11.781*tCoord + 2*PI*Time/timePeriod) + (12.292)*cos(13.744*tCoord + 2*PI*Time/timePeriod) + (-7.547)*sin(13.744*tCoord + 2*PI*Time/timePeriod) + (-11.297)*cos(15.708*tCoord + 2*PI*Time/timePeriod) + (-16.009)*sin(15.708*tCoord + 2*PI*Time/timePeriod) + (-7.647)*cos(17.671*tCoord + 2*PI*Time/timePeriod) + (12.403)*sin(17.671*tCoord + 2*PI*Time/timePeriod) + (8.697)*cos(19.635*tCoord + 2*PI*Time/timePeriod) + (7.403)*sin(19.635*tCoord + 2*PI*Time/timePeriod) + (5.674)*cos(21.598*tCoord + 2*PI*Time/timePeriod) + (-11.008)*sin(21.598*tCoord + 2*PI*Time/timePeriod) + (-8.233)*cos(23.562*tCoord + 2*PI*Time/timePeriod) + (-3.261)*sin(23.562*tCoord + 2*PI*Time/timePeriod) + (-3.985)*cos(25.525*tCoord + 2*PI*Time/timePeriod) + (8.205)*sin(25.525*tCoord + 2*PI*Time/timePeriod) + (7.937)*cos(27.489*tCoord + 2*PI*Time/timePeriod) + (1.267)*sin(27.489*tCoord + 2*PI*Time/timePeriod) + (0.605)*cos(29.452*tCoord + 2*PI*Time/timePeriod) + (-6.452)*sin(29.452*tCoord + 2*PI*Time/timePeriod) + (-6.257)*cos(31.416*tCoord + 2*PI*Time/timePeriod) + (0.000)*sin(31.416*tCoord + 2*PI*Time/timePeriod) + (0.471)*cos(33.379*tCoord + 2*PI*Time/timePeriod) + (5.023)*sin(33.379*tCoord + 2*PI*Time/timePeriod) + (4.801)*cos(35.343*tCoord + 2*PI*Time/timePeriod) + (-0.767)*sin(35.343*tCoord + 2*PI*Time/timePeriod) + (-1.866)*cos(37.306*tCoord + 2*PI*Time/timePeriod) + (-3.841)*sin(37.306*tCoord + 2*PI*Time/timePeriod) + (-2.964)*cos(39.270*tCoord + 2*PI*Time/timePeriod) + (1.174)*sin(39.270*tCoord + 2*PI*Time/timePeriod)

1650.4065 + (-11.2848*1e1)*cos(1.963*x) + (4.398)*sin(1.963*x) + (-3.42*1e1)*cos(3.927*x) + (8.0262*1e1)*sin(3.927*x) + (6.9031*1e1)*cos(5.890*x) + (-2.4899*1e1)*sin(5.890*x) + (-15.064)*cos(7.854*x) + (-2.3672*1e1)*sin(7.854*x) + (-2.7692*1e1)*cos(9.817*x) + (6.149)*sin(9.817*x) + (15.507)*cos(11.781*x) + (18.800)*sin(11.781*x) + (12.292)*cos(13.744*x) + (-7.547)*sin(13.744*x) + (-11.297)*cos(15.708*x) + (-16.009)*sin(15.708*x) + (-7.647)*cos(17.671*x) + (12.403)*sin(17.671*x) + (8.697)*cos(19.635*x) + (7.403)*sin(19.635*x) + (5.674)*cos(21.598*x) + (-11.008)*sin(21.598*x) + (-8.233)*cos(23.562*x) + (-3.261)*sin(23.562*x) + (-3.985)*cos(25.525*x) + (8.205)*sin(25.525*x) + (7.937)*cos(2.7489*1e1*x) + (1.267)*sin(2.7489*1e1*x) + (0.605)*cos(29.452*x) + (-6.452)*sin(2.9452*1e1*x) + (-6.257)*cos(3.1416*1e1*x) + (0.000)*sin(3.1416*1e1*x) + (0.471)*cos(3.3379*1e1*x) + (5.023)*sin(3.3379*1e1*x) + (4.801)*cos(35.343*x) + (-0.767)*sin(3.5343*1e1*x) + (-1.866)*cos(3.7306*1e1*x) + (-3.841)*sin(3.7306*1e1*x) + (-2.964)*cos(3.9270*1e1*x) + (1.174)*sin(3.9270*1e1*x)

You can see what I mean from the color markings. Don't be surprised, I replaced tCoord with x and removed + 2*PI*Time/timePeriod because I wanted to test something in Matlab.

Hi,

We could not reproduce in Omnis 5.2.
Could you please send an email to academic-cfd@cadence.com for further investigation?

Best regards,

Colinda

Hey,

I really dont get it.  I have now restarted the simulation and again taken the function defined in Pascal and there are no more problems. I can even increase the number of terms up to 29 without problems, the only thing that has changed from yesterday to today, the restart of the laptop :D. Yesterday, however, the method mentioned above was the only possible one, maybe the whole thing is due to the fact that the functions are so long, however, it still does not make sense....

Hi, 

OMNIS allows long expression. The problem is not due to the expression but something else. Next time, if you encounter the same issue, you can check the log file located in the folder _openlabs under the simulation directory.

Regards,

Dianliang

ah good to know thx,  one last thing would be, in the analysis context I can see the name of the boundary condition I want to modify. For example: "absoluteTotalTemperature", to write in OpenLabs the command ExistingBc, so in the tutorial of fineOpen there is written Inlet too, is that necessary ? ->ExistingBC: "absoluteTotalPressure", Inlet

otherwise how can I keep the memory of the simulation smaller or reduce it. Maybe under Simulation/Control -> output Solution every ... time Steps ? 

You must  provide the information of the boundary that will be customized. Otherwise, OpenLabs cannot know which boundary needs to be changed.

The "Inlet" in FineOpen tutorial is the name of the boundary.

You must  provide the information of the boundary that will be customized. Otherwise, OpenLabs cannot know which boundary needs to be changed.

The "Inlet" in FineOpen tutorial is the name of the boundary.

thx for your response, ah okay not only the boundary condition needs to be named, the boundary too. I want to modify the absolute total pressure and absolut total temperature at the inlet too, therefore i will use the name of the boundary conditions and the boundary inlet too, thx