Detached-eddy simulations past a circular cylinder. (English) Zbl 0990.76032

Travin, Andrei; Shur, Michael; Strelets, Michael; Spalart, Philippe

Flow Turbul. Combust. 63, No. 1-4, 293-313 (2000).

From the summary: The flow is calculated with laminar separation at Reynolds numbers 50,000 and 140,000, and with turbulent separation (TS) at 140,000 and \(3\times 10^6\). The TS cases are effectively tripped, but compared with untripped experiments at very high Reynolds numbers. The finest grid has about 18,000 points in each of 56 grid planes spanwise; the resolution is far removed from direct numerical simulations, and a turbulence model controls the turbulent separation. The agreement is quite good for drag, shedding frequency, pressure, and skin friction. However, the disagreement with experimental Reynolds stresses reaches about \(30\%\), and the length of the recirculation bubble is about double that measured. The discrepancies are discussed, as are the effects of grid refinement, Reynolds number, and a turbulence-model curvature correction.

MSC:

76F65	Direct numerical and large eddy simulation of turbulence
76F06	Transition to turbulence
76D10	Boundary-layer theory, separation and reattachment, higher-order effects
76M20	Finite difference methods applied to problems in fluid mechanics

Keywords:

cylinder; spatial fifth-order upwind scheme; temporal implicit three-layer second-order-accurate scheme; artificial compressibility; laminar separation; turbulent separation; direct numerical simulations