Courant number

srrmm27 · February 24, 2017, 06:03

1.why does fluent solve problems by bringing down global courant number to 1 when the limit is upto 250? Why doesnt it solve at 249 or within that range?
2. can we use the source terms for multi-phase vof model, while the linearised mass transfer udf remains at "yes" state? if yes, then what difference does it make as compared to using source terms with linearised mass transfer udf being at "no" state
Many thanks

LuckyTran · February 25, 2017, 00:38

1) Fluent does a stability check and if it thinks the solution is diverging, it will reduce the time-step.

February 24, 2017, 06:03	Courant number	#1
srrmm27 New Member srrmm27 Join Date: Jan 2017 Posts: 2 Rep Power: 0	1.why does fluent solve problems by bringing down global courant number to 1 when the limit is upto 250? Why doesnt it solve at 249 or within that range? 2. can we use the source terms for multi-phase vof model, while the linearised mass transfer udf remains at "yes" state? if yes, then what difference does it make as compared to using source terms with linearised mass transfer udf being at "no" state Many thanks

February 25, 2017, 00:38		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 66	1) Fluent does a stability check and if it thinks the solution is diverging, it will reduce the time-step. Last edited by LuckyTran; February 26, 2017 at 18:46.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[General] Extracting ParaView Data into Python Arrays	Jeffzda	ParaView	30	November 6, 2023 21:00
[snappyHexMesh] Error snappyhexmesh - Multiple outside loops	avinashjagdale	OpenFOAM Meshing & Mesh Conversion	53	March 8, 2019 09:42
Sudden jump in Courant number	NJG	OpenFOAM Running, Solving & CFD	7	May 15, 2014 13:52
IcoFoam parallel woes	msrinath80	OpenFOAM Running, Solving & CFD	9	July 22, 2007 02:58