This paper describes an experimental study of the drag force experienced by a stationary smooth sphere placed in a boundary layer type gradient flow. The test sphere was kept close to as well as away from the boundary. Both smooth and rough boundary conditions were studied. The Reynolds number...
Mikhailov MD, Silva Freire AP (2013) The drag coefficient of a sphere: An approximation using Shanks transform. Powder Technology 237: 432-435.The drag coefficient of a sphere: An approximation using shanks transform[J] . M.D. Mikhailov,A.P. Silva Freire.Powder Technology . 2012...
For the case of a spherical particle (including bubble and drop) in axisymmetric creeping flow (particle Reynolds number Rep << 1) (Clift et al., 1978), the drag coefficient is analytically derived from the so-called Hadamard–Rybczynski solution of the flow field: (2.96)CD=−8Rep2+3λ...
The reference area depends on what type of drag coefficient is being measured. For automobiles and many other objects, the reference area is the frontal area of the vehicle (i.e., the cross-sectional area when viewed from ahead). For example, for a sphere A = π r (hence not the ...
Wind tunnel experiments were performed on both a life-like manikin and a human to find the aerodynamic drag of various body positions typical in sports. Information on aerodynamic drag is useful for modelling high speed sports. All the t... RA Walpert,CR Kyle - 《Journal of Biomechanics》 被...
1.A garment comprising:a panel substantially encircling an appendage of a wearer, wherein the panel is configured to reduce drag on the appendage of the wearer from an oncoming fluid;the panel further comprising:a first panel region having a first texture, a second panel region having a second...
In the latter case, it was found that the early crisis of drag for the sphere is accompanied by a crisis of its heat exchange with gas. In addition, the numerical simulation of the heat exchange of a drop of liquid with a gas stream was carried out without taking into account its ...
The previous analytical solution for the drag coefficient (Cd) for a spherical particle attached on the flat surface, which was derived by O聮Neill (1968), is only valid in the creeping flow conditions. In this study, the drag coefficient of the particle in the particle Reynolds number (Rep...
In experimental investigations aimed at finding the drag coefficient of a solid sphere moving through a fluid various techniques were employed.For evaluating the motion of a solid object in a gaseous medium one has to know the drag coefficient of the considered object. It is therefore not ...
Proceedings of the Royal Society A: Mathematical, Physical & Engineering SciencesJourdan, G., Houas, L., Igra, O., Estivalezes, J.L., Devals, C., Meshkov, E.E., "Drag coefficient of a sphere in a non- stationary flow: new results," Proceedings of the Royal Society A: ...