Results 271 to 280 of about 40,791 (308)

Slip Length and Problem of Anomalous Velocity Profile

4th AIAA Theoretical Fluid Mechanics Meeting, 2005
The most used expression for the slip length in the slip flow regime where slip conditions are needed for flow prediction comes from a Maxwell description of kinetic boundary conditions and depends on one coe dient only. Even if generally associated to the tangential accommodation coe dient, this coe dient equals any kind of kinetic property ...
Dadzie, K., Meolans, J.G.
openaire   +2 more sources

Velocity inversion and predicting velocity slip on curved surfaces

AIP Conference Proceedings, 2012
Couette 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, Robert W. Barber, David R. Emerson, Stefan K. Stefanov   +3 more
openaire   +1 more source

Slip velocity and velocity inversion in a cylindrical Couette flow

Physical Review E, 2009
Velocity inversion in a nanoscale cylindrical Couette flow is investigated with the Navier-Stokes (NS) equation and molecular-dynamics (MD) simulation. With general slip boundary conditions in the NS equation, the flow can be classified into five distinct profiles. The condition of velocity inversion is explored in the whole space of four dimensionless
openaire   +2 more sources

Experimental investigation of the influence of slip velocity and temperature on permeability during and after high-velocity fault slip

Journal of Structural Geology, 2012
Abstract We used a rotary shear apparatus to investigate changes of fluid transport properties in a fault zone by real-time measurement of gas flow rates during and after shearing of hollow sandstone cylinders at various slip rates. Our apparatus measures permeability parallel to the slip plane in both the slip zone and wall rocks.
Wataru Tanikawa, Hideki Mukoyoshi, Osamu Tadai   +2 more
openaire   +1 more source

The velocity slip of polar fluids

Rheologica Acta, 1975
The theory of polar fluids, briefly reviewed and shown to be identical to the theory of micropolar fluids, is applied to five different viscometric flows and to the flow around a slowly rotating sphere. Comparing theoretical predictions with experimental results for the viscometric flows it is demonstrated that the theory may serve as a model for the ...
openaire   +1 more source

Slip velocity and slip layer thickness in flow of concentrated suspensions

Journal of Applied Polymer Science, 1998
The rheological characterization of highly filled suspensions consisting of a Newtonian matrix (hydroxyl-terminated polybutadiene), mixed with two different sizes of aluminum powder (30% and above by volume) and two different sizes of glass beads (50% and above by volume), was performed using a parallel disk rheometer with emphasis on the wall slip ...
Faezeh Soltani, Ülkü Yilmazer
openaire   +1 more source

A porous slider with velocity slip

Fluid Dynamics Research, 2012
A porous slider, i.e. a solid levitated by fluid injection from its porous bottom to reduce the sliding drag, is studied theoretically in this paper. Slip is present on both the slider and the ground. This three-dimensional problem is transformed to a set of high-order, nonlinear similarity equations.
openaire   +1 more source

Slip velocity during wetting of solids

Journal of Colloid and Interface Science, 1977
Abstract A slip velocity at the contact line of a liquid drop on a solid surface originates because of the force induced by the gradient of the chemical potential in the liquid along the solid-liquid interface. Einstein's equation is used to relate the slip velocity and the force.
E Ruckenstein, C.S Dunn
openaire   +1 more source

Slip velocities in agitated vessel crystallisers

Journal of Crystal Growth, 1972
Abstract Growth rates of ammonium alum crystals have been measured at different fluid velocities in a single crystal growth cell and a fluidised bed, and at different stirrer speeds in a turbine agitated vessel. To compare the latter with the former, it is necessary to know the particle-fluid slip velocity as a function of the impeller speed, and the
A.W. Nienow, P.D.B. Bujac, J.W. Mullin
openaire   +1 more source

Velocity Measurements of Bismuth Clusters : Velocity Slip and Fragmentation Processes

1987
Bismuth clusters are produced by the inert gas condensation technique. The clusters velocity is studied systematically as a function of the helium pressure. A large velocity slip is observed between He and the clusters. This velocity slip depends on the mass cluster and allows us to select in size the neutral clusters.
M. Broyer, B. Cabaud, A. Hoareau, P. Melinon, D. Rayane, B. Tribollet   +5 more
openaire   +1 more source