# slip velocity

## slip velocity

[′slip və‚läs·əd·ē]
(fluid mechanics)
The difference in velocities between liquids and solids (or gases and liquids) in the vertical flow of two-phase mixtures through a pipe because of the slip between the two phases.
References in periodicals archive ?
The effect of filler on slip velocity of the molten polymer composites was evaluated in accordance with the Mooney method [48-50], Measurements were carried out using three capillary dies with L/D = 30 and diameter of D = 0.
Assuming that the profile of coefficient of friction verses slip velocity remains similar at all temperatures and using the values of the coefficient of frictions versus temperature at a particular slip velocity, we have extrapolated the variation of coefficient of friction with sliding velocities at temperatures T=20[degrees]C, 40[degrees]C, and 60[degrees]C, respectively, as shown in Fig.
U is the slip velocity and A is the projected area of the spherical particle.
Without these mechanisms, dynamic rupture easily reaches seismic slip velocity of about 1m/s, which is roughly constrained by seismic wave speed (~3km/s) and by strain change ([10.
Slip velocity is observed to occur under no slip condition for low and high Reynolds numbers but not for free slip condition.
The given model employs the two-way coupling approach by Crowe (2000), where the turbulence generation terms are proportional to the squared slip velocity, and the turbulence attenuation terms are expressed via the hybrid length scale [L.
costume field function to calculate X slip velocity and Y slip velocity form the multiphase flow model.
It can be observed that as RP becomes more negative slip velocity decreases for both heat generation and absorption.
Gas-solid flow with the slip velocity of particles in a horizontal channel // J.
For a single particle in the fluid flow, the drag force of fluid exerted on the particle is expressed as a function of the slip velocity kinetic energy, the particle's cross sectional area, and an empirical drag coefficient [9].
so that the slip velocity between the gas and liquid phases is:

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