Measurements of lift and torque on a rotating sphere at intermediate reynolds numbers

Oesterlé, B.; Tri, Bui Dinh; Vial, J.L.

doi:10.1016/0093-6413(91)90043-v

Cited by 15 publications

(4 citation statements)

References 6 publications

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“…24 They observed a ratio of about 0.55 in the unbounded linear shear flow. Oesterle et al 26 and Tanaka et al 27 observed experimentally the ratios of 0.4–0.25, respectively. The difference between the results and experiments in this paper can be attributed to the wall effect.…”

Section: Resultsmentioning

confidence: 91%

Characteristics of lift and resistance of spherical wall in semi-unbounded flow field

Zou

Wang

Xue

2022

Advances in Mechanical Engineering

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The dynamic characteristics of the wall lift and drag of the rigid sphere moving parallel to the single wall surface in the static viscosity laminar flow field are numerically studied, on the basis of the three-dimensional numerical simulation method of the quasi-steady “relativity of motion.” The results show that: (1) The wall surface acts to increase the drag; (2) On the near wall, the lift coefficient decreases as the Reynolds number between the sphere and the wall increase when Re < 100. However, when Re > 100, the lift coefficient increases sharply; (3) On the far wall, there is no wall effect when Re > 10, consistent with the unbounded flow, but the wall effect still exists when Re < 10; and (4) The particle rotation has few influences on drag but slightly increases the lift. And the lift induced by rotation is mainly determined by the surrounding fluid pressure. These results all contribute to the study of the hydrodynamic behavior of particles in the boundary and deepen the understanding of the phenomenon of particle transport in the wall effect layer.

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Section: Resultsmentioning

confidence: 91%

Characteristics of lift and resistance of spherical wall in semi-unbounded flow field

Zou

Wang

Xue

2022

Advances in Mechanical Engineering

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“…Where, u is the velocity vector of airflow, v is velocity vector of particles, Ω is the vorticity of airflow, t is time, ρ is air density, ρ p is particles density, d is particle radius, g is acceleration of gravity, ω is angular velocity vector of particles, C d is viscosity coefficient, C L is Magnus force coefficient which adopts the numerical value educed by Tsuji [6] and Oesterle [7] . Subscript express velocity component along with each axis.…”

Section: Numerical Evaluationmentioning

confidence: 99%

Study of Numerical Evaluation about Kinestate of Mixed Particles in Rectilinear-Flow Pneumatic Conveyance

Chen

Yang

2012

AMM

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The effect of rectilinear-flow upon kinestate of particles had been investigated by numerical calculation about mixed particle swarm in the process of pneumatic conveyance. The effect of kinestate upon pressure loss, particles position and velocity has been analyzed. The air velocity is 20m/s, and the length of the pipe is 4m. It was found that most particles are accumulated at the bottom of the pipe, and particles velocity tends to stabilize at the top. Stopping would probably be formed at the bottom if the energy of air stream is not enough. In addition, bottom of pipe exceeds top in the number of collision between particles because of the accumulation of particles, so pressure loss at the bottom is much more than that of the top.

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“…In contract, for down-How the bubble tend to migrate toward the center of the pipe [4,5]. The particle migration is observed also in gas-solid particle fiow [6], and in concentrated suspensions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Generalized diffusion theory of hydrodynamical particle migration in suspensions. Part 1: The case of equal densities

Diep¹

1997

Vietnam J. Mech.

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Abstract. The general continuum theory has been developed for two-phase flows of fluid with deformable particles, where the micro-deformation of particles and the relative motion between phases have been taken into account [1][2][3].This paper is concerned with using the simplest model from developed general theory for modeling of particle migration in suspensions-one of the most important and complicated aspects of particle--liquid two-phase flows, that has been observed and studied by many authors. For this purpose it is considered the motion of Newtonian fluid-rotating rigid spherical particles two-phase continuum with specialized nonlinear constitutive equations, when the particle and fluid have equal densities.The obtained equation system has b.een used for studying quantitatively particle migration problem in the circular Couette flow.

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Measurements of lift and torque on a rotating sphere at intermediate reynolds numbers

Cited by 15 publications

References 6 publications

Characteristics of lift and resistance of spherical wall in semi-unbounded flow field

Characteristics of lift and resistance of spherical wall in semi-unbounded flow field

Study of Numerical Evaluation about Kinestate of Mixed Particles in Rectilinear-Flow Pneumatic Conveyance

Generalized diffusion theory of hydrodynamical particle migration in suspensions. Part 1: The case of equal densities

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