Learning Forum

[vinigm16]

Hello everyone. I'm trying to generate a XY- Transient Chart using an expression in the Data Series Tab, setting the X-axis as Time and the Y-axis as the Expression.

The expression is a scalar value, which is the Mean Flow Rate passing through a defined area in a 3D simulation.

For each time-step the resulting value changes. That’s what I’m trying to plot.

After defining the Expression, I created a scalar Variable by selecting the Expression.

Then, I created the Transient Chart. The following print-screens show the selected options I’ve set.

 

The generated chart was as it follows:

 

 

It seems that the software doesn’t read, or doesn't show the different result values of the expressions for each time-step.

I already checked that the result value of expression changes as I change the current time-step. I also tried to multiply the expression by 1000 to get higher values but the same thing happens.

Can anyone help me with this task? Is there something that I’m missing?

Thank you

[CFD_Friend]

Hi Vinicius,

I dont see any mistakes in the way you have set this up. Does this happen for other expressions or only this expression alone?

[vinigm16]

Hello,

 

Thank for your reply.

 

It happens only with this expression.

 

I tried to make a new expression as the previous one but using an existing Location instead of an IsoClip, and it worked. 

 

Then, I tried to make a new expression at the same CFD-Post File, where I changed the Location for another one, repeating the process to generate the Transient Chart, but the same problem happened.

 

After it, I started a new File creating only the expression and Transient Chart that didn't worked in the last File, and it worked out.

 

It seems that I cannot use Isoclips with the expressions and I can work only with one expression at a time in the same file.