Results 241 to 250 of about 1,160,835 (292)
Some of the next articles are maybe not open access.
Journal of Fluid Mechanics, 2002
The lift force on a circular particle in plane Poiseuille flow perpendicular to gravity is studied by direct numerical simulation. The angular slip velocity Ωs=Ωp+½γ˙, where −½γ˙ is the angular velocity of the fluid at a point where the shear rate is γ˙ and Ωp is the angular velocity of the particle, is always positive at an equilibrium position at
Joseph, D. D., Ocando, D.
openaire +1 more source
The lift force on a circular particle in plane Poiseuille flow perpendicular to gravity is studied by direct numerical simulation. The angular slip velocity Ωs=Ωp+½γ˙, where −½γ˙ is the angular velocity of the fluid at a point where the shear rate is γ˙ and Ωp is the angular velocity of the particle, is always positive at an equilibrium position at
Joseph, D. D., Ocando, D.
openaire +1 more source
Slip Factor and Slip Velocity on a Permeable Bed
Journal of Coastal Research, 2012Abstract CHEN, Y.-Y.; CHEN, G.-Y., and LIN, C.-H. 2012. The slip factor and slip velocity on a permeable bed. In the present study, a new, simple method for determining the slip velocity (also called the bed velocity) at the solid-fluid interface in the wave boundary layer is proposed. Based on experimental and numerical results, when waves travel over
Yang-Yih Chen +2 more
openaire +1 more source
Retinal slip velocities in congenital nystagmus
Vision Research, 1989An analysis of waveform velocities was performed on 16 individuals with congenital nystagmus. The fast phases were shown to be saccadic in nature and their main sequence peak velocity was significantly slower than that of the normal control group (P less than 0.01).
R V, Abadi, R, Worfolk
openaire +2 more sources
Extension of the Helmholtz-Smoluchowski velocity to the hydrophobic microchannels with velocity slip
Lab Chip, 2009Electrokinetic flows through hydrophobic microchannels experience velocity slip at the microchannel wall, which affects volumetric flow rate and solute retention time. The usual method of predicting the volumetric flow rate and velocity profile for hydrophobic microchannels is to solve the Navier-Stokes equation and the Poisson-Boltzmann equation for ...
H M, Park, T W, Kim
openaire +2 more sources
Local slip velocity in a downer
China Particuology, 2003Abstract Based on the EMMS model, the local slip velocity between gas and solid is systematically analyzed and a theoretical correlation of local slip velocity with local voidage for a downer is derived as follows: u s ( r ) u t = D 8 / 7 ( 1 - ɛ mf ) - 2 / 7 [ 1 - ɛ ( r ) ɛ (
Songgeng Li, Weigang Lin, Jianzhong Yao
openaire +1 more source
Experiential investigation of cluster velocity and slip velocity in the CFB riser
Powder Technology, 2020Abstract Cluster velocity and slip velocity are the important features of cluster hydrodynamics and the statistical analysis was carried out based on the moving direct of the clusters in this work. Lagrange approach was employed to compute the velocity of the clusters which were captured by a high speed camera in a thin 2D fluidized bed.
Hengzhi Chen +4 more
openaire +1 more source
Velocity inversion and predicting velocity slip on curved surfaces
AIP Conference Proceedings, 2012Couette flow between two concentric rotating cylinders is a classical fluid dynamics problem that is discussed in many textbooks. However, under certain conditions, the flow between the cylinders can exhibit a highly non-intuitive behavior. For example, when the inner cylinder is rotating and the outer cylinder is stationary, it is possible to obtain ...
Ali Dinler +3 more
openaire +1 more source
Velocity Slip Coefficient and the Diffusion Slip Velocity for a Multicomponent Gas Mixture
The Physics of Fluids, 1971Simple and accurate expressions for the velocity slip coefficient and the diffusion slip velocity are obtained by applying a variational technique to the linearized Boltzmann equation for a multicomponent gas mixture.
openaire +2 more sources
Prediction of fluid velocity slip at solid surfaces
Physical Review E, 2011The observed flow enhancement in highly confining geometries is believed to be caused by fluid velocity slip at the solid wall surface. Here we present a simple and highly accurate method to predict this slip using equilibrium molecular dynamics. Unlike previous equilibrium molecular dynamics methods, it allows us to directly compute the intrinsic wall-
Hansen, J. S. +2 more
openaire +4 more sources