Time discretization

pejmanpark · June 23, 2011, 05:31

Dear Friends,

Does anyone know what is the method that Fluent use for the second order time discretization?

Regards,
Pej

akj · June 23, 2011, 08:38

When second-order accuracy is desired, quantities at cell faces are computed using a
multidimensional linear reconstruction approach. In this approach, higher-order
accuracy is achieved at cell faces through a Taylor series expansion of the cell-centered
solution about the cell centroid.

pejmanpark · June 23, 2011, 08:51

Dear Anil,

Thanks for your reply. I think what you mentioned is mostly about the spatial discretization not the temporal (time) discretization. Do you know which scheme does Fluent use to descritize time with 2nd order accuracy? Something like Runge-kutta, Adam Bashforth,...?

June 23, 2011, 05:31	Time discretization	#1
pejmanpark New Member Pejman Sho Join Date: Jul 2009 Posts: 12 Rep Power: 16	Dear Friends, Does anyone know what is the method that Fluent use for the second order time discretization? Regards, Pej

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June 23, 2011, 08:38		#2
akj New Member anil Join Date: Jun 2011 Location: chennai Posts: 20 Rep Power: 14	When second-order accuracy is desired, quantities at cell faces are computed using a multidimensional linear reconstruction approach. In this approach, higher-order accuracy is achieved at cell faces through a Taylor series expansion of the cell-centered solution about the cell centroid.

June 23, 2011, 08:51		#3
pejmanpark New Member Pejman Sho Join Date: Jul 2009 Posts: 12 Rep Power: 16	Dear Anil, Thanks for your reply. I think what you mentioned is mostly about the spatial discretization not the temporal (time) discretization. Do you know which scheme does Fluent use to descritize time with 2nd order accuracy? Something like Runge-kutta, Adam Bashforth,...?