Results 221 to 230 of about 27,153 (261)

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
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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.
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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
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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.
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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
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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
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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
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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 ...
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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
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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.
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