Sheet/cloud cavitation usually leads to a wide range of length scales in both turbulence and phase distribution from microbubbles cavity advection. In the present work, Eulerian–Lagrangian multiscale model with two-way coupling is utilized simulate cavitating flow around (National Advisory Committee for Aeronautics) NACA66 hydrofoil at an incidence angle 8° number σ = 1.4. The can simultaneousl...

retinal detachment surgery has been considered an inpatient hospital procedure requiring preoperative and postoperative hospitalization. in this pilot study, outpatient retinal detachment surgery was performed on sixteen patients and the results (100% success rate after an average follow-up of 8.3 months) were comparable or better than reported overall success rates for retinal detachment in th...

In many materials processing and manufacturing situations such as steel, aluminum, ceramics, and glass, gas bubbles can form in liquid and solid phases. The presence of such bubbles affects the thermophysical properties and radiation characteristics of the two-phase system and hence the transport phenomena. This paper presents a general formulation of the radiation characteristics of semitransp...

Recently, the bubble-based systems have offered a new paradigm in microfluidics. Gas bubbles are highly flexible, controllable and barely mix with liquids, and thus can be used for the creation of reconfigurable microfluidic systems. In this work, a hydrodynamically actuated bubble-based microfluidic system is introduced. This system enables the precise movement of air bubbles via axillary feed...

Bubble columns (with and without suspended solids) have been used widely as chemical reactors, bioreactors and equipment for waste water treatment. The key design parameters in bubble columns are: • gas holdup; • gas-liquid interfacial area; • volumetric liquid-phase mass transfer coefficient; • gas and liquid axial dispersion coefficients; Despite the large amount of studies devoted to hydrody...

OBJECTIVES To compare the incidence of retinal detachment in patients treated with the ganciclovir implant compared with those treated using systemic therapy only, among 511 patients with the acquired immunodeficiency syndrome (AIDS) and cytomegalovirus (CMV) retinitis and to describe the influence of highly active antiretroviral therapy (HAART) on retinal detachment incidence. PATIENTS AND M...

An analysis was performed of the rise characteristics of bubbles, which are also growing, in a pressure Iield which is decreasing exponentially with time. The bubble rise and growth occur due to flash evaporation caused by reducing the pressure in the vapor space above a pool of liquid. Basset’s bubble momentum equation was modified to include the effects of the generated pressure wave, and to ...

The effect of surface roughness on nucleate boiling heat transfer is not clearly understood. This study is devised to conduct detailed heat transfer and bubble measurements during boiling on a heater surface with controlled roughness. This second of two companion papers presents an analysis of heat transfer and bubble ebullition in nucleate boiling with new measures of surface roughness: area r...