Journal ArticleDOI
Boundary layer over a blunt body at high incidence with an open-type of separation
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In this article, the boundary layer structure over a non-spherical and non-conical blunt body has been analyzed and the rule of the zone of dependence has been observed.Abstract:
This paper presents general methods for calculating three dimensional laminar boundary layers over inclined blunt bodies (not necessarily bodies of revolution). Complete incompressible results for a prolate spheroid at 30 degrees incidence are presented, and the computational procedures are described. The rule of the zone of dependence was observed. The results display for the first time the boundary layer structure over a non-spherical and non-conical blunt body in all details, and confirm the open-type of separation proposed earlier.read more
Citations
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A Description of Eddying Motions and Flow Patterns Using Critical-Point Concepts
and A E Perry,Min S Chong +1 more
TL;DR: On montre l'utilite des concepts de point critique dans la comprehension des regimes d'ecoulement as mentioned in this paper, le methode analytique et exemples d'application.
Journal ArticleDOI
Topology of Three-Dimensional Separated Flows
Murray Tobak,David J. Peake +1 more
TL;DR: In this article, the authors define a small number of singular points (nodes, saddle points, and foci) that characterize the patterns on the surface and on particular projections of the flow (e.g., the crossflow plane).
Journal ArticleDOI
Graphical visualization of vortical flows by means of helicity
TL;DR: In this paper, the authors introduced normalized helicity and helicity density for the graphical representation of three-dimensional flow fields that contain concentrated vortices, which can be used to identify and accentuate the concentrated vortex-core streamlines and mark their separation and reattachment lines.
Journal ArticleDOI
Exact theory of three-dimensional flow separation. Part 1. Steady separation
TL;DR: In this paper, the authors derived an exact theory of three-dimensional steady separation and reattachment using nonlinear dynamical systems methods and obtained criteria for separation points and separation lines on fixed no-slip boundaries in compressible flows.
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Incompressible Boundary-Layer Separation
TL;DR: For high-Reynolds-number flow over bodies or in confined channels the effects of viscosity are generally limited to a thin layer, the boundary layer, adjacent to the bounding surface, but when the imposed pressure gradient is adverse, the thickness of the viscous layer increases as momentum is consumed by both wall shear and pressure gradient.
References
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Journal ArticleDOI
Three-dimensional boundary layer near the plane of symmetry of a spheroid at incidence
TL;DR: In this article, an implicit finite difference method of the Crank-Nicolson type was used to obtain the boundary-layer results on both the leeside and windside of a prolate spheroid.
Journal ArticleDOI
On the determination of the zones of influence and dependence for three-dimensional boundary-layer equations
TL;DR: In this article, the authors re-examined the zones of influence and dependence for three-dimensional boundary-layer equations from the viewpoint of the subcharacteristics of the equations.