Problem with DT

hi every one
WARNING: velocity higher than maximum allowed velocity: 0.18182 (to change this adjust the scale factor MAX_INLET_VEL_FAC)
DT < DT_MIN. Recovery not possible
how can I fix this problem?
shanzdahemordad.mfx (18.5 KB)

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Increase the value of MAX_INLET_VEL_FAC. It may help with intermediate velocity values that exceed the boundary value. The key is available on the Numerics pane under Advanced. You an also find it using the search feature accessed via the question mark (?).

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thanks for replying
I change the mesh and increase the value of MAX_INLET_VEL_FAC and solved my problem.