[Julian121]

Originally Posted by ghorrocks

0.001% imbalances are pretty small for most cases. But you should do a sensitivity analysis to see if it is OK in your case.

Is 40 time steps OK? Do a time step sensitivity analysis and find out!

By the time step sensitivity analysis you mean increaseing the number of time steps per a passing period and the solution should not change?

[ghorrocks]

A sensitivity analysis is you change the input parameter (mesh size, convergence criteria, time step size) and you see if the outputs change by an amount you care about. Make sure your change to the inputs is big enough to be useful - halving the element edge length (results in 5-8 times more elements), halving time step size or x0.1 for convergence criteria are normal increments. And whether the output has converged or not depends on how accurate you want to be.

[Julian121]

Originally Posted by AtoHM

Not sure what the options are right now, but Continue History From basically just adds the time steps of your new simulation to the ones you already had. So if your first run went to 1000 steps, the new run will start with 1001. I'm not sure if this is actually valid when using steady state as initialization because time and timestep are not available in this content.
You won't need Continue History From.

When restarting a transient run from workbench by clicking on the solution, the solver input file is selected by the workbench as the last .res file.

In the run folder, another file such as name_full.trn is saved.

Should I change the .res file to .trn file when restarting a transient simulation?

The default initialization option is “current solution data”. I there a need to change that?