Showing papers in "International Journal of Multiphase Flow in 1976"

TL;DR: In this article, the importance of the fluctuating nature of two-phase gas-liquid flows has been emphasized and a review of the literature is presented, with a focus on the inherent discreteness of these flows.

TL;DR: In this paper, the propagation properties of instability waves in a two-dimensional liquid fluidized bed are reported. But, although the waves experience an initially exponential growth in amplitude, the ultimate state of motion exhibited is that of the complicated formation and destruction of cylindrical bubble-like structures.

TL;DR: In this paper, the conservation equations for one-dimensional two-phase flow are derived from first principles and the effects of the radial distributions of velocities, enthalpies, and void fraction are taken into account through the use of correlation coefficients.

TL;DR: In this paper, the Stokes flow past finite axial assemblages of up to 9 spheres in an infinitely long cylindrical tube for a wide range of sphere spacings and sphere to cylinder diameter ratios is investigated.

TL;DR: In this article, a necessary critical flow criterion is obtained by equating to zero the determinant of the set of equations describing the steady-state flow, and this criterion must be complemented by the compatibility conditions of a set.

TL;DR: In this article, a hydrodynamic theory of the process of thinning of one-sided and symmetrical emulsion films is presented, and the complete set of Navier-Stokes equations for the dispersion phase is solved.

TL;DR: In this article, a uniform theoretical treatment for local tracer experiments performed at several sites inside the flow systems is provided. But this treatment is restricted to more complex situations and is not applicable to the case of large flow systems.

TL;DR: In this article, the authors present experimental studies of interface behavior when a gas flow, confined in a vertical tube, flows past a stationary body of liquid, and critical conditions necessary for the interface to become unstable or break up are investigated.

TL;DR: In this article, a heat transfer problem for an infinitely long heated cylinder and a small heated sphere, each freely suspended in a general linear flow at Reynolds numbers Re ⪡ 1, is solved, and asymptotic solutions to the convection problem are developed for very large values of the Peclet number Pe.

TL;DR: The motion of large drops with Eotvos numbers as high as 1000 has been investigated in large tanks where wall effects are negligible as mentioned in this paper, and the ellipsoidal-cap drops obey an equation based upon an extension of the Davies and Taylor theory for bubbles in liquids.

TL;DR: In this paper, the wall-vortex effect has been studied in single-phase and two-phase flow and it has been shown that the intensity and size of these vortices depend on the local velocity gradients normal to the wall.

TL;DR: In this paper, two models are presented for predicting magnetohydrodynamic pressure drop in two phase gas-liquid flows of conducting fluids for large values of Hartmann number, and they do not differ significantly in their predictions of overall pressure drop for vaporising two-phase flow of potassium.

TL;DR: In this article, a theoretical study of the evaporation of binary mixtures in upward annular flow is presented and the resulting equations solved to give axial and radial variations of concentrations, temperatures and flowrates of ethanol-water mixtures.

TL;DR: In this article, upper and lower bounds for the creeping flow of an Ellis fluid past an assemblage of solid spheres are obtained using a combination of Happel's free surface model and variational principles.

TL;DR: In this article, a technique for metering two-phase gas-liquid mixtures is described, which consists of a concentric constriction device and an ultrasonic cross-correlation velocity meter.

TL;DR: In this paper, the stress variational principle is employed to obtain the lower bound for the drag offered by the creeping flow of a power law fluid past a Newtonian fluid sphere.

TL;DR: In this article, upper and lower bounds on the drag offered by a Newtonian fluid sphere placed in an Ellis model fluid in creeping flow have been found using variational principles, in good agreement with those reported by earlier investigators.

TL;DR: In this article, the authors considered the entrainment of solid particles by gas jets discharged downwards through slotted nozzles into bubble-free beds of fluidized particles, and calculated the momentum boundary layer thickness and shear stress at the horizontal interface between jet and particles.

TL;DR: In this article, a study of the flow of isoamyl alcohol and water in sloping tubes and a stratified ribbon of alcohol is found, which is not seen with air and water, and this accounts for some corrosion failures in boilers.

TL;DR: In this article, a new formulation of the system of the differential equations which replaces the equation governing the condensate mass fraction is proposed, which involves the calculation of quantities related to the description of the particle size distribution: the mean size, the number of particles per unit time, the second and third centered relative moments.

TL;DR: In this article, the authors derived the rate of liquid entrainment and droplet size at the interfaces of subsonic and sonic gas jets submerged in a liquid and showed that droplet sizes depend on the Mach number or compressibility of the gas stream.

TL;DR: In this article, a simulation model was developed to analyze the hydrodynamics of dispersions in agitated batch and continuous systems, and the model enabled the drop size distribution and average drop size to be calculated from given physical and operating properties of the system.

TL;DR: In this paper, the flow in the developing laminar boundary layers on a flat moving gas-liquid interface is studied theoretically, and it is shown that flows depend on two parameters, each less than unity.

TL;DR: In this article, the average local particle concentration in fully turbulent duct flow is determined by measuring the average particle concentration of the local particle fraction in the duct flow, and typical local concentration measurements are reported.

TL;DR: An experimental and theoretical study of a finite amplitude pressure wave propagating through a two-phase media of about 0.9999-0.99999 void fraction is performed in this article, where experiments are done in a vertical shock tube and show that the shock wave is broken down into an initial sharply rising wave and a second gradually rising wave.

TL;DR: In this paper, an experimental and theoretical investigation of the velocity distribution in the laminar boundary layers at a moving interface generated by a counter-current gas-liquid stratified flow has been made.

TL;DR: In this paper, the average local particulate velocity and concentration distributions in the wake of a cylinder immersed in a stream containing a polydisperse aerosol were determined for both parameters, and it was found that the particulate centerline defect persists a considerable distance downstream of the cylinder before fully developed conditions are satisfied.