Specifying the time-dependence (SW Flow Simulation)

[bart1111]

Hi!
I'm currently working on a project where I'm calculating wing loads in a derrick. Due to the size of my structure and the velocity involved (27 m/s), I have to use the "Time-dependent" option in Wizard. I have a hard time specifying the correct time-dependence values. To be more precise, the "Total analysis time" and the "Output time step". What influence do these values have on my project, and what do they mean?

Thanks!

 

[kellnerp]

Output time step is easy. The software may take many small incremental time steps to solve the problem. You may want to skip a number of those steps in saving output date. So you make the Output time step bigger than the time step increments you are using. It is a judgement call on your part based on disk space requirements.

Total analysis time sounds like the the time over which you wish to calculate a solution. If a gust acts for 60 seconds then maybe you want to look at some multiple of that to capture any vortices that form. Total analysis time probably has nothing to do with how long it will actually take to solve.

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