This paper describes an investigation, which uses a torquemeasurement technique, of effects of axial flow on the stability of Taylor-Couette flow. Two radius ratios, 0.846 and 0.956, are used. The preliminary results show that the critical Taylor number for the onset of Taylor vortices increases monotonically with the Reynolds number of the axial flow and asymptotes to a constant value. Althoug...

We produced several types of multiple emulsion in one chip by controlling the wetting property of the Cross-shaped microchannel with Octadecyltrichlorosilane (OTS) and UV irradiation. The number of inner droplet was controlled flexibly by changing flow rate both in sheath-flow and alternative generation. Spherical and nonspherical polymer beads containing inner droplets were also produced. This...

Abstract Present work implements the Energy gradient method (EGM) to study effect of variation in eccentricity, radius ratio and inner pipe movement on fully developed flow Newtonian fluid through an annulus for instability. The formula stability parameter has been derived considering eccentricity annulus. Results have plotted (K) various ratio. Further, relationships critical also obtained. Fl...

Electroosmotic flow within capillary zone electrophoresis can be altered electronically through a mechanism modeled as surface conductance. Experimentally, a small zone of conductive silver on the outer surface of the capillary is shown to permit good control of electroosmotic flow with an applied external voltage. This control is modeled as capacitance across the capillary wall and conductance...

The effect of reducing systemic arterial pressure with an arteriovenous fistula on left and right ventricular myocardial blood flow was studied in 17 anaesthetised, open chest, autonomically blocked dogs. Global and regional myocardial blood flows were measured with radioactive microspheres. As mean arterial pressure was reduced from 133 mmHg to 78 mmHg left ventricular myocardial blood flow an...

in this paper, the dynamic simulation for a high pressure regulator is performed to obtain the regulator behavior. to analyze the regulator performance, the equation of motion for inner parts, the continuity equation for diverse chambers and the equation for mass flow rate were derived. because of nonlinearity and coupling, these equations are solved using numerical methods and the results are ...

We have conducted a numerical studv of spherical Couette Vlow -the flow between differentiallv rotatin~ concentric spheres. When the qa D ratio o{(R2-RI)/RI (where R 1 and R 2 are the radii of the inner and outer spheres) is small, the flow near the e~uator resembles that between cylinders, the classic Tavlor-Couette ~roblem. As in Tavlor-Couette flow, when the angular momentum gradient, measur...

We propose a physical framework for interpreting the broad band power spectra from black hole and neutron star binaries. We use the truncated disc/hot inner flow geometry, and assume that the hot flow is generically turbulent. Each radius in the hot flow produces fluctuations, and we further assume that these are damped on the viscous frequency. Integrating over radii gives broad band continuum...

A linear stability analysis has been carried out for flow between porous concentric cylinders when radial flow is present. Several radius ratios with corotating and counter-rotating cylinders were considered. The radial Reynolds number, based on the radial velocity at the inner cylinder and the inner radius, was varied from -30 to 30. The stability equations form an eigenvalue problem that was ...