Learning Forum

[fuyu-m]

Hello, In 2019R3, “Time-Varying Boundary Conditions” function was added. This feature is very useful. When setting boundary conditions for time change in table format, data created in Excel etc. in ".csv format" can be imported. However, the imported data may differ from the original data (image 1 and 2). There may be no difference between the imported data and the original data (image 3 and 4).   When I tried it, I got the following result. There are differences: flow velocity, swirl inflow, rotating wall, gravity No difference: inlet pressure, outlet pressure, mass flow, heat flow, heat flux   If there is more than one column of data, it appears that there is a difference between the imported data and the original data. Please tell me how to avoid this problem.   Thank you.

[Gaurav Sharma]

Hi Fuyu-m

I could reproduce your observations and can say something seems to be going wrong here, possibly a bug. 

Let me discuss this with the development and will get back to you soon. In the meantime, as a workaround, you may directly edit the values in DL,  rather importing it through a CSV.

Regards,

Gaurav

[fuyu-m]

Gaurav_ANSYS 

Thank you for your quick reply.

I will type directly until the csv import issue is resolved.
I hope this problem will be solved soon.

Thank you.

[Gaurav Sharma]

Fuyu-m 

I had a discussion with the developer and he mentioned that since magnitude of velocity is a quantity derived from components, it would be a redundant input in the csv. So for inputting fluid velocity, the csv is expected to have a column for time and the next column is read as x component and NOT the magnitude.

Keeping this in mind, I tried to import the following CSV and the result I got is as expected;

 

It can be seen that the magnitude is auto calculated from the components, as shown at T=0.0 sec.

Please let me know if you have any further query.

Best Regards,

Gaurav

[fuyu-m]

Gaurav_ANSYS 

I am sorry for my late response.
I understand your thoughts. We also confirmed that the csv import function works that way.

However, I think it is confusing that the table format input to csv is different from that used in “Time-Varying Boundary Conditions”. I hope it will be improved.

Thank you.

[Gaurav Sharma]

Fuyu-m 

I agree this is confusing and have already shared this with development. Hope to see the improvement in next release.

Regards,

Gaurav