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-   -   implicit / explicit solvers (https://www.cfd-online.com/Forums/flow-3d/76496-implicit-explicit-solvers.html)

jk75 May 27, 2010 04:20

implicit / explicit solvers
 
Hi all,

is there a rule of thumb to determine witch solver (implicit or explicit) is suited better for a given problem?

Regards,
Johannes

jk75 May 27, 2010 08:15

solved
 
http://www.flow3d.com/cfd-101/cfd-10...t-schemes.html

ignatz May 29, 2010 03:35

I think the default (explicit) is preferred/recommended for reasons of accuracy.

hamidciv March 4, 2017 11:18

Hi Dear friends;

whether using implicit solvers for viscous stress & free surface pressure & advection could be good idea to calculate the sediment scour phonomena in order to reduce the computational time Or it's not recommended?

i appreciate for any comment that could be useful for me.

best regards
hamid

bfox48 March 6, 2017 12:04

In the text output in the simulation manager tab, you can get information from the stability code on what is limiting the timestep. Look up the meaning of each code in the user manual. Once you determine which model is limiting the timestep, you can then change this to implicit to try and speed up the simulation.

hamidciv March 10, 2017 15:32

Dear Brian, thanks for your response.

with the best wishes for you
hamid


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