Coupled scheme

sr71_blackbird · August 25, 2021, 17:16

Hello there!

Can someone please explain to me how Coupled scheme works and when I can use it? I tried to search for information on the internet but I didn't found anything interesting or understandable. Any links would be helpful.

LuckyTran · August 26, 2021, 03:32

If you are asking about the Coupled Pressure-Velocity coupling scheme in Fluent...

It solves the continuity and momentum equations simultaneously for pressure and velocity instead of resorting to a pressure correction approach like in SIMPLE and such.

It's almost always appropriate to use the coupled scheme. There are some differences in speed, convergence rate, and scalability in parallel performance. You might end up with a preference with experience but it's robust.

August 25, 2021, 17:16	Coupled scheme	#1
sr71_blackbird New Member Liam Join Date: Feb 2021 Posts: 3 Rep Power: 5	Hello there! Can someone please explain to me how Coupled scheme works and when I can use it? I tried to search for information on the internet but I didn't found anything interesting or understandable. Any links would be helpful.

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August 26, 2021, 03:32		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,761 Rep Power: 66	If you are asking about the Coupled Pressure-Velocity coupling scheme in Fluent... It solves the continuity and momentum equations simultaneously for pressure and velocity instead of resorting to a pressure correction approach like in SIMPLE and such. It's almost always appropriate to use the coupled scheme. There are some differences in speed, convergence rate, and scalability in parallel performance. You might end up with a preference with experience but it's robust.