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Time-dependent calculation: any shortcuts?

Question asked by Steve Calkins on Feb 3, 2014
Latest reply on Feb 6, 2014 by Steve Calkins



  My application involves cooling an object from an initial temperature (500C) in an array of air nozzles over 90 seconds.  Running the simulation on the entire assembly is taking ridiculous amounts of time (I set it to run over the weekend, and Monday morning the solver had made it through under one second of physical time, and said it had over 800 hours of computation time left).

  The individual nozzles solve quickly, when simulated as a steady-state flow problem.  Is there a way to solve for the flow conditions, then assign the temperature to the part, and solve for the transient case?

  I've been looking into the transferred boundary condition technique, but I'm either doing something wrong, or it's not a valid way to approach this.