Courant Number Shoot up! -- CFD Online Discussion Forums

April 6, 2016, 12:03	Courant Number Shoot up!	#1
NightWing Member Akr Join Date: Apr 2015 Location: India Posts: 53 Rep Power: 11	I am trying to run a simulation using BuoyantBoussinesqPimpleFOAM. I have re-modified the solver as a laminar transient one. In the control dict even though i have specifed maxCo has 0.5, during simulation the max courant number reaches values in the range10k-100k+ and still the simulation keeps on running. Mean courant number also varies from 0.001 to 100+ ranges. i have chosen the deltat based on the formuale (i.e. velocity/smallest cell in domain) and i am sure my mesh is a very good mesh. But ANyone know why this happens??? Any idea??

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