How to know if the solution of Lagrangian multiphase is trustable?

siara817 · September 4, 2012, 04:41

I am simulating particle behaviour in a room in the steady state case by Lagrangian multiphse. How to know that the solution of the lagrangain is converged?

abdul099 · September 6, 2012, 15:56

One way coupling or two way coupling?
In case of one way coupling: Just get a converged velocity field without Lagrangian and solve Lagrangian at the end for some steps.
In case of two way coupling: Try to monitor some solution data until it doesn't change anymore and residuals are leveled out.

siara817 · October 26, 2012, 09:13

What to do if some of the parcels in the domain reach the maximum sub steps? I increased the max number of sub steps to 2,000,000. But still is not enough and 2 of 20 parcels reach the maximum sub steps.

September 4, 2012, 04:41	How to know if the solution of Lagrangian multiphase is trustable?	#1
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 17	I am simulating particle behaviour in a room in the steady state case by Lagrangian multiphse. How to know that the solution of the lagrangain is converged?

September 6, 2012, 15:56		#2
abdul099 Senior Member Join Date: Oct 2009 Location: Germany Posts: 636 Rep Power: 21	One way coupling or two way coupling? In case of one way coupling: Just get a converged velocity field without Lagrangian and solve Lagrangian at the end for some steps. In case of two way coupling: Try to monitor some solution data until it doesn't change anymore and residuals are leveled out. siara817 likes this. __________________ We do three types of jobs here: GOOD, FAST AND CHEAP You may choose any two!

October 26, 2012, 09:13		#3
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 17	What to do if some of the parcels in the domain reach the maximum sub steps? I increased the max number of sub steps to 2,000,000. But still is not enough and 2 of 20 parcels reach the maximum sub steps. __________________ Good luck Siamak

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