Numerical investigations of flow over a sphere in the subcritical and supercritical regimes

  title={Numerical investigations of flow over a sphere in the subcritical and supercritical regimes},
  author={George Constantinescu and Kyle D. Squires},
  journal={Physics of Fluids},
The flow field around a sphere in an uniform flow has been analyzed numerically for conditions corresponding to the subcritical (laminar separation) and supercritical (turbulent separation) regimes spanning a wide range of Reynolds numbers (104–106). Particular attention has been devoted to assessing predictions of the pressure distribution, skin friction, and drag as well as to understanding the changes in the wake organization and vortex dynamics with the Reynolds number. The unsteady… 
Investigation of transitional turbulence models for CFD simulation of the drag crisis for flow over a sphere
The drag crisis is an interesting physical phenomenon for flow over bluff bodies, where the drag coefficient suddenly drops as the Reynolds number increases. This behavior is caused by the flow
Direct numerical simulation of the flow over a sphere at Re = 3700
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Detached-eddy simulation (DES) is used to study the massively separated flow over a rounded-corner square. The configuration is an idealization of the flow around a forebody cross section rotating at
Unsteady force measurements in sphere flow from subcritical to supercritical Reynolds numbers
The flow over a smooth sphere is examined in the Reynolds number range of 5.0 × 104 < Re < 5.0 × 105 via measurements of the fluctuating forces and particle image velocimetry measurements in a planar
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The flow over a stationary golf ball has been numerically investigated by conducting large-eddy simulations in the subcritical, critical and supercritical regimes. A direct comparison of features of
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The separated flow over a cylinder elongated by another cylinder of a smaller diameter is investigated numerically at the high subsonic regime using zonal detached eddy simulation (ZDES) and compared
Numerical Investigation of Flow over a Sphere using LES and the Spalart-Allmaras Turbulence Model
Numerical simulations of forced convection of air for flow over a sphere are presented. The primary aim is to determine if FLUENT, a commercial computational fluid dynamics software package, is


LES and DES investigations of turbulent flow over a sphere
Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) are applied to prediction and investigation of the ow around a sphere. DES is a hybrid approach in which the closure is a simple modi
Flow past a sphere up to a Reynolds number of 300
The flow of an incompressible viscous fluid past a sphere is investigated numerically and experimentally over flow regimes including steady and unsteady laminar flow at Reynolds numbers of up to 300.
Large Eddy Simulation of Turbulent Flow Over a Sphere Using an Immersed Boundary Method
Abstract : Large eddy simulation of turbulent flow over a sphere is conducted at two different Reynolds numbers (Re = 3700 and 10(exp 4)) based on the free-stream velocity and the sphere diameter, in
LES and DES Investigations of Turbulent Flow over a Sphere at Re = 10,000
Large Eddy Simulation (LES) using a dynamic Smagorinsky type subgridstress (SGS) model and Detached Eddy Simulation (DES) are applied toprediction and investigation of the flow around a sphere at a
Numerical investigation of transitional and weak turbulent flow past a sphere
This work reports results of numerical simulations of viscous incompressible flow past a sphere. The primary objective is to identify transitions that occur with increasing Reynolds number, as well
Detached-Eddy Simulations Past a Circular Cylinder
The flow is calculated with laminar separation (LS) at Reynolds numbers 50,000 and 140,000, and with turbulent separation (TS) at140,000 and 3 × 106. The TS cases are effectively tripped, but
Dynamic wall modeling for large-eddy simulation of complex turbulent flows
The efficacy of large-eddy simulation (LES) with wall modeling for complex turbulent flows is assessed by considering turbulent boundary-layer flows past an asymmetric trailing-edge. Wall models
Finite element simulations of incompressible flow past a heated/cooled sphere
SUMMARY This paper reports numerical simulation of the flow past a heated:cooled sphere. A Galerkin finiteelement method is used to solve the 3D incompressible Boussinesq equations in primitive
Wall-layer models for large-eddy simulations
The numerical simulation of high Reynolds number flows is hampered by model accuracy if the Reynolds-averaged Navier–Stokes (RANS) equations are used, and by computational cost if direct or
Vortex shedding from spheres at Reynolds numbers from 3 × 102 to 4 × 104 in a uniform flow was investigated experimentally. Standard hot-wire technique were used to measure the vortex shedding