HELP! Plot values not matching TimeStep

aligs2920 · July 29, 2020, 23:12

Hi,

I am studying turbulent flow around heated cylinders aligned one after another. I am able to simulate the flow and get reports. I made Nusselt number (Nu) reports for each cylinder and created monitors and plots from them. Once the simulation is done, I export the plots to MATLAB for the analysis I want to do.

My issue is that the plots dont show the value of Nu at each timestep. My timestep is 0.005s but the values in the exported files go up in steps of 0.03

I don't know how to fix this since I need to use the proper timestep in my MATLAB analysis.

Is it possible to fix this? Or is there some truncation that Star automatically does when plotting values from reports?

Thanks!

ping · July 31, 2020, 02:25

i imagine you are exporting monitored values from your reports and thus the problem is probably the trigger setting in the monitor not being set to your required setting of time-step

July 29, 2020, 23:12	HELP! Plot values not matching TimeStep	#1
aligs2920 New Member Ali Join Date: Mar 2020 Location: UK Posts: 2 Rep Power: 0	Hi, I am studying turbulent flow around heated cylinders aligned one after another. I am able to simulate the flow and get reports. I made Nusselt number (Nu) reports for each cylinder and created monitors and plots from them. Once the simulation is done, I export the plots to MATLAB for the analysis I want to do. My issue is that the plots dont show the value of Nu at each timestep. My timestep is 0.005s but the values in the exported files go up in steps of 0.03 I don't know how to fix this since I need to use the proper timestep in my MATLAB analysis. Is it possible to fix this? Or is there some truncation that Star automatically does when plotting values from reports? Thanks!

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July 31, 2020, 02:25		#2
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	i imagine you are exporting monitored values from your reports and thus the problem is probably the trigger setting in the monitor not being set to your required setting of time-step