
Re: Timedependent calculation: any shortcuts?
Jared Conway Feb 5, 2014 11:44 PM (in response to Steve Calkins)How long does a steady state of all the nozzles take?
You should be able to setup the steady state and use it as the starting point even if you override the temp conditions of a component at the start. What is your work flow? Suggest you start with a simple model that you can post to get help.

Re: Timedependent calculation: any shortcuts?
Steve Calkins Feb 6, 2014 11:22 AM (in response to Jared Conway)Hi Jared,
Thanks for the response.
I've been plugging away at this for a few days now, and I came up with pretty much the solution you suggest. I ran just the steady state simulation, which ran pretty quickly by itself, then set up another configuration for the transient simulation, using the SS results as the initial conditions. The transient simulation starts out using very small time steps, but they get progressively larger, and the total run time is only about 5 to 10 minutes.

Re: Timedependent calculation: any shortcuts?
Jared Conway Feb 6, 2014 11:24 AM (in response to Steve Calkins)you can also experiment with constant time steps



Re: Timedependent calculation: any shortcuts?
Chris Michalski Feb 6, 2014 11:46 AM (in response to Steve Calkins)Another way to speed things up would be to use flow freezing so that once it solves the fluid motion you can suspend that portion of the calculation and only have it calculate the heat transfer aspects.

Re: Timedependent calculation: any shortcuts?
Steve Calkins Feb 6, 2014 5:28 PM (in response to Chris Michalski)I used flow freezing, as well. I set it to freeze at time = 0, rather than after a set time or number of intervals.
