[ufocfd]

// simpleFoam initial screen output looks like this:

Time = 0.1

GAMG: Solving for p, Initial residual = 1,
time step continuity errors : sum local = 0.0964558,
smoothSolver: Solving for omega, Initial residual = 0.999483,
bounding omega, min: -28.9635 max: 3.69255e+009 average:
smoothSolver: Solving for k, Initial residual = 1,
ExecutionTime = 39.047 s ClockTime = 39 s

// but does not contain the usual info about ux uy uz, like this:

smoothSolver: Solving for Ux, Initial residual = 1,
smoothSolver: Solving for Uy, Initial residual = 1,
smoothSolver: Solving for Uz, Initial residual = 1,

// very strange!

[ufocfd]

forgot to change the setting of defaultFaces to "patch" (instead of "empty") in the "boundary" file in /0/polyMesh

This meant that the BCs for defaultFaces were not being applied,
which meant the U field was diverging.

bit of a tricky problem to trace back - but probably a common user error!

[ashishmagar600]

Thanks for sharing.