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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Inviscid flow over a semicircle simulation issue › Reply To: Inviscid flow over a semicircle simulation issue

September 16, 2024 at 1:31 pm
Petros
Ansys Employee

Hi,

Reynolds number must be less than 5 in order for the flow to remain attached. For this case based on the contour and assuming air as the medium, the cylinder diameter should be ~5μm to have a Re<5, which I guess it is not. Thus you are in the turbulent regime and flow recirculation is expected.