We present a microfluidic platform for simultaneous on-chip pumping and size-based separation of cells and particles without external fluidic control systems required for most existing platforms. The device utilizes an array of acoustically actuated air/liquid interfaces generated using dead-end side channels termed Lateral Cavity Acoustic Transducers (LCATs). The oscillating interfaces generat...

During the summers of 1987 and 1988, 15 dye-tracer tests from a total of eight injection points were conducted in the ablation area of Midtdalsbreen, a northern outlet of Hardangerj0kulen, southern Norway. The spatial and temporal patterns of water discharge, shapes of the dye-return curves, through-flow velocities, dye-recovery rates, dispersivities, and velocity/ discharge relationships sugge...

Being subjected to a high-pressure abrasive water jet, solid samples will experience an essential variation of both internal stress and physical characteristics, which is closely associated with the kinetic energy attached to the abrasive particles involved in the jet stream. Here, experiments were performed, with particular emphasis being placed on the kinetic energy attenuation and turbulent ...

Design of a natural dry cooling tower has been accomplished in two sections: the design of heat exchangers and the numerical solution of flow through the tower. Heat exchanger (Heller type) has been simulated thermodynamically and then coupled with a computer program, which calculated the turbulent natural convection flow through the tower. The computer program developed for this purpose can be...

This research is to incorporate three efficient ways that will increase the performance of baffled heat exchangers. The 1st technique represented by baffle perforating create pores through which secondary streams pass in order reduce main stream pressure on flow areas. A 2nd redesigning structure replacing its square edge with arched X-velocity facilitate towards outlet and Y-velocity values fl...

The evaporative cooling pad system permits to cool buildings with less consumption of the electricity and without any use refrigerant gases. A good must have a higher coefficient performance lower rate water consumption. In this study, Taguchi method is used investigate effect velocity, thickness pad, type pads on performances cellulosic pads. It was found that velocity has more influence while...

[1] Debris flows have typically been viewed as two-phase mixtures of sediment and water, but in forested mountain landscapes, wood can represent a sizable fraction of total flow volume. The effects of this third phase on flow behavior are poorly understood. To evaluate whether wood can have a significant effect on debris flow runout in small mountainous watersheds, we used a landscape-scale mod...

The purpose of this work is investigation the distribution gas phase velocity and liquid irrigation density at outlet heat exchange tube a vertical falling film evaporator. Experimental studies hydrodynamics two-phase flow were carried out on pilot instalation. Radial distributions various distances from lower section heating are obtained. It established that high velocities contribute to turbu...

The heat transfer system of the pipe for furnace application was newly introduced and need to be analyzed. study aims numerically model investigate externally blown heated furnace. itself is source briquette production inside oven. investigation includes analysis temperature, air flow velocity also pressure pipes. employed Computational Fluid Dynamics methodology intended results. Three cases w...

The timing of the valves of a hydraulic motor plays an important role in determining the throttling energy. To reduce this dominating energy loss, the timing of the valves must allow the fluid in the chamber to be precompressed and decompressed such that there is minimal pressure differential across the transitioning valve. The optimal valve timing to achieve precompression and decompression is...