I hope to simulate flow enters the pipe. I want to show velocity profile with the time in the pipe.

How can I select time step and physical time for the unsteady problems?

Is the solution for every time step reach to conversion?

Thanks

I hope to simulate flow enters the pipe. I want to show velocity profile with the time in the pipe.

How can I select time step and physical time for the unsteady problems?

Is the solution for every time step reach to conversion?

Thanks

Dear Joe Galliera, I have problems with a trasient analysis that always the iteration number r_000xxx.fld shows zero r_000000.fld, do you have idea why this?

Gracias

F.Bernal

With what you have shown it will start saving at 0 seconds and save the results every 1 second.

You need to make sure that on the "Finish" tab you have selected conditions that allow it to run long enough to capture that data. If you limit it to 4 travels (default) and have a fast flow, it might achieve 4 travels before 1 second and you would not have any intermediate data. You would be best to clear all of the Finish settings except for the total simulated time.

For a transient solution, travels is automatically not selected (pretty sure of this off the top of my head), but if it is then as Chris suggested turn it off.

- You have the period time saving of results, suggest that you set the appropriate value to capture the changing physics of the problem,
- but you can manually add any other times outside of that period in the calculation control options (on the last tab, "Advanced" I think it reads),
- or in the solver monitor window just by simply selecting file> save current result.
- You can also stop the calculation at any time that you wish, change the saving period value (calc control options), and continue the solver.

You can try project > wizard > analysis type > time dependent, and enter total analysis time and time step.