Learning Forum

[martina.mohr]

Hello,   I wanted to add a chart with a calculated value to my solution monitors in order to better judge the convergence. In the Discovery AIM Documentation under “Examples of Calculated Value Monitors” all the created charts show the value over the iterations as seen below: 640 However, all the charts I try to create following the exact same steps as listed in the documentation show the convergence over the Iteration:   How do I change this? I'd like to see the calculated value instead of the convergence.   Thank you in advance.

[Subashni Ravichandran]

Hello Martina_Mohr

For a Calculated value monitor, you can generate a Chart with either Iterations or Time on the X-axis and the Calculated value on the Y-axis as shown in this Knowledge article. 

[martina.mohr]

Hello Subashni 

thank you for your reply. However, I don't see the "Show Chart" option described in the Knowledge article. 

[Subashni Ravichandran]

Hello Martina_Mohr

I quickly ran a simulation to check and clarify this issue.

I see that generating a chart from 'Monitors' for a calculated value, plots 'Convergence' vs 'Iterations' but essentially the Y-axis plots the Calculated Value only.

Below is an example to verify the same. 

I gave an inlet velocity of 5 m/s to the geometry shown in the figure.

 

But when I generated a Calculated Value chart from 'Monitors', you will notice that the Y-axis shows the velocity magnitude indeed but 'Convergence' is written across it.

 

So this seems like an issue with the naming of the Y-axis.

I do understand this can be rather confusing. I will verify this with my team and see what can be done to correct it. 

[martina.mohr]

Hi Subashni 

 

this doesn't seem to be the case for me. The calculated value which I'm monitoring during the solution shows a temperature of 46,854 °C as a result once the simulation is fisnished, while the values displayed on the Y-axis as the "convergence" range above 300. 

My Simulation doesn't seem to converge at the moment (even when it runs more than 50 iterations), therefore it would be really useful to see, how the actual temperature changes with the iterations to better understand what the convergence is like. 

[Subashni Ravichandran]

Hello Martina_Mohr

Would it be possible for you to share the model with us for investigation?

I have sent an Ansys Secure Transfer link to you via email. 

[Subashni Ravichandran]

Hello Martina_Mohr

Thank you for sharing the model.

If you run your mouse over the Result value, you will see the value in Kelvin and it comes to something over ~300K.

This is what is represented on the Y-axis of Chart 2.

You can also run your mouse over the curve o the chart and monitor the value at each iteration.

You will observe that the last iteration value matched the Result value in Kelvin units.

Hope this solution helps.

[martina.mohr]

Hi Subashni

I did not pay attention to the unit of the value. Thank you very much for your help!