Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Time dependent function and stationary study
Posted 2023年2月10日 GMT-5 04:24 Modeling Tools & Definitions, Modeling Workflow 3 Replies
Please login with a confirmed email address before reporting spam
There is a time dependent fuction in my model. However, in the study, the step 1 is stationary study and the next step of time dependent study is based on the solvution of the stationary study. So is there any way to solve the error of stationary study calculation due to the existence of the time dependent function? The system keeps showing undefined variable 't'
Please login with a confirmed email address before reporting spam
Hi Yu,
A Stationary study step does not depend on time, but you can add a parameter t defined as some time to be able to solve equations using time-dependent settings as a stationary solution for that time.
Best regards,
Magnus
Please login with a confirmed email address before reporting spam
Magnus, I'm not sure how to implement this. Can you post a sample .mph or a screenshot showing the setup?
Please login with a confirmed email address before reporting spam
Magnus, I'm not sure how to implement this. Can you post a sample .mph or a screenshot showing the setup?
Hi Sean,
If you have an expression with "t" somewhere in your model and want to solve it using a stationary solver, you can then simply add a parameter or constant t and give it a value, such as 0. You can use a Parameters node, or you can define it as a constant in the Stationary Solver settings (see the attached screenshot).
Best regards,
Magnus
Attachments: