OpenFOAM: v1912 released! - For more information see https://www.openfoam.com/releases/openfoam-v1912
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system/fvSolution file is now mandatory
Special treatment for the dictionary include keyword has was removed after being deprecated many versions ago.
Writing the turbulence viscosity field nut is now optional via the option -write-nut
Power of 2 data samples constraint was removed
secondaryWrite option in the system/controlDict superseded by the writeObject function object.