Results 261 to 270 of about 40,791 (308)

Slip Factor and Slip Velocity on a Permeable Bed

Journal of Coastal Research, 2012
Abstract 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, Guan-Yu Chen
exaly   +2 more sources

Experiential investigation of cluster velocity and slip velocity in the CFB riser

Powder Technology, 2020
Abstract 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, Yuxuan Ding, Sumin Gu, Chao Geng, Wei Sheng   +4 more
exaly   +2 more sources

Study of slip velocity and application of drift-flux model to slip velocity in a liquid–solid circulating fluidized bed

Advanced Powder Technology, 2011
Abstract The increasing applications of liquid–solid circulating fluidized bed in chemical/biochemical industries require a better understanding of hydrodynamics of such system. This work aims to experimentally investigate the slip between the phases in a LSCFB.
Natarajan Palani, Velraj Ramalingam
exaly   +2 more sources

Slip velocity and lift

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

Retinal slip velocities in congenital nystagmus

Vision Research, 1989
An 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, 2009
Electrokinetic 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, 2003
Abstract 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

Prediction of fluid velocity slip at solid surfaces

Physical Review E, 2011
The 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., Todd, Billy, Daivis, Peter J.   +2 more
openaire   +4 more sources

Velocity Slip Coefficient and the Diffusion Slip Velocity for a Multicomponent Gas Mixture

The Physics of Fluids, 1971
Simple 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

Slip velocities in pneumatic transport part I

Powder Technology, 1986
Abstract Slip velocities between air and solids were measured in a cocurrent flow apparatus where solids are conveyed up by moving air. Solid velocities were inferred from measured thrust imparted by the air-solid stream on the deflecting impact plate placed at the exit of the transport tube.
S.Ravi Sankar, T.N. Smith
openaire   +1 more source