a r t i c l e i n f o a b s t r a c t When a buoyant volume of fluid impinges a horizontal boundary, it spreads symmetrically in the Stokes flow limit. We investigate the low Reynolds number spreading of a low-viscosity volume of fluid, hereafter called a " bubble " , in the limit that the fluids are miscible and interfacial tension can be neglected; the symmetry of the bubble's spreading is br...

Submitted for the DFD08 Meeting of The American Physical Society Cardiovascular microbubble transport in vessel bifurcations with pulsatile flow: experimental model and theory1 DOUG VALASSIS, ROBERT DODDE, BRIJESH ESHPUNIYANI, J. BRIAN FOWLKES, JOSEPH BULL, University of Michigan — The behavior of long gas bubbles suspended in liquid flowing through successive bifurcations was investigated expe...

today one of the major questions in the iranian economy is that do liquidity injected into the economy more effected productive activities or speculative activities .this study was conducted to compare the effects of liquidity growth on real sector and assets market bubbles in iranian economy during the period 1994(2)-2012(1). for this purpose, price index of four major assets in iranian econom...

We thank Mr. Herbst for his comments and review of our article “Air transmission comparison of the Affinity Fusion oxygenator with an integrated arterial filter to the Affinity NT oxygenator with a separate arterial filter.” We designed this in vitro study to answer the question of whether the Fusion oxygenator with its integrated arterial filter was as safe as our clinically used Affinity NT o...

An approach to the kinetics of barrier formation of supercritical gas bubbles in a strongly supersaturated liquid solution is presented. A common assumption of uniform reduction of a dissolved gas supersaturation in a liquid solution via stationary diffusion to nucleating gas bubbles is shown to be not applicable to the case of high gas supersaturations. The approach recognizes that the diffusi...

Digital Image Analysis (DIA) has been employed to characterize the time evolution of a bubble injected from a single orifice into a pseudo 2-dimansional gas-solid fluidized bed. The injected bubble diameter increased with the square root of time before detachment. During bubble free flight in the bed, its diameter remains approximately constant. The center of mass of the bubble increases with t...

A method to extract shapes of bubble polyhedra from three-dimensional nuclear magnetic resonance image data of foam has been developed. The method consists of four steps: first, to compute series of maximum intensity projection images from the three-dimensional NMR image data of foam to visualize the network structure of the bubble edges; second, to measure the three-dimensional coordinates of ...

The success of flotation operation depends upon the thriving interactions of chemical and physical variables. In this work, the effects of particle size, bubble size, and collector dosage on the bubble loading in a continuous flotation column were investigated. In other words, this work was mainly concerned with the evaluation of the true flotation response to the changes in the operating varia...

____________ _ An in vitro method to collect and quantify volumes of gaseous microemboli generated by a bubble oxygenator has been developed. Gaseous microemboli generated by a bubble oxygenator are captured and collected in a vortex separation test cell. The cells are pressurized and the resultant pressure changes are converted to volume gas readings using a standard calibration curve. A doppl...

We report on an Atomic Force Microscopy (AFM) study of AFM tip-nanobubble interactions in experiments conducted on argon surface nanobubbles on HOPG (highly oriented pyrolytic graphite) in water in tapping mode, lift mode and Force Volume (FV) mode AFM. By subsequent data acquisition on the same nanobubbles in these three different AFM modes, we could directly compare the effect of different ti...