Rectangular dropshafts, commonly used in sewers and storm water systems, are characterized by significant flow aeration. New detailed air–water flow measurements were conducted in a near-full-scale dropshaft at large discharges. In the shaft pool and outflow channel, the results demonstrated the complexity of different competitive air entrainment mechanisms. Bubble size measurements showed a br...

in this paper meteorological conditions of some acute air pollution periods for the city of tehran have been considered. the data used were obtained from the air quality control company (aqcc) of municipality and from synoptic station of the institute of geophysics. initially some statistical methods were used to find the episodes for acute air pollution episodes, and then their meteorological ...

In an open channel, a hydraulic jump is the rapid transition from superto sub-critical flow associated with strong turbulence and air bubble entrainment in the mixing layer. New experiments were performed at relatively large Reynolds numbers using phase-detection probes. Some new signal analysis provided characteristic air–water time and length scales of the vortical structures advecting the ai...

Bubble sensing pdf Bubble-Sensing: A New Paradigm for Binding a Sensing Task to the Physical. seminar on bubble sensing.pdf Bubble-sensing locations to acquire tasks and do the sensing on behalf of the.used in current participatory sensing applications, and assess the threats to user. bubble sensing pdf download The Bubble-sensing model 68, 69 is a hybrid alternative to the purely.Jan 22, 2012....

in this study, the effects of moisture content and corn variety on the physicochemical properties of popcorn were investigated and modeled using response surface methodology. each of the two corn varieties (hybrid corn ksc 600 pc and american) was prepared with a range of moisture (six moisture levels ranging from 10 to 20%) and popped by a hot air popper. variety and moisture content affected ...

Amphiphilic molecules spontaneously adsorb to fluid polar-nonpolar interfaces. The timescale of such adsorption depends on the molecular size and structure solute. This process should be accompanied by a power heat exchange that could detected commercial isothermal calorimeters. Air is injected in bulk different aqueous solutions contained sample cell an titration calorimeter. formation resulti...

BACKGROUND The currently low implantation rate after embryo transfer (ET) is partially attributed to technical aspects, such as catheter type, catheter load, placement of catheter tip and physician skills. METHODS Mock ET simulations were conducted with a transparent laboratory model of the uterine cavity. The catheter was loaded with alternating air and coloured liquid media. The transfer pr...

Collisions between millimeter-size bubbles in water against a glass plate are studied using high-speed video. Bubble trajectory and shape are tracked simultaneously with laser interferometry between the glass and bubble surfaces that monitors spatial-temporal evolution of the trapped water film. Initial bubble bounces and the final attachment of the bubble to the surface have been quantified. W...

Turbulence in the surfzone mixes momentum vertically, transmits stress to the sea bed, influences the structure of the crossand alongshore currents, and controls the suspension of sediment from the sea bed. In many coastal and shelf environments, the sea-bed is the primary source of tur­ bulence due to bottom induced shear. In the surfzone, the breaking-wave generated turbulence dominates over ...

____________ _ 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...