This paper presents the refrigerant adiabatic upward flow in the vertical header of microchannel heat exchanger and its effect on distribution. R410A is circulated into the header through the microchannel tubes (5 or 10 tubes) in the bottom pass and exits through tubes (5 or 10 tubes) in the top pass representing flow in the heat pump mode of reversible systems. Three circular headers were expl...

Abstract In the framework of development SWGO experiment, we have performed a detailed study single unit an extensive air shower observatory based on array water Cherenkov detectors. Indeed, one possible detector configurations for consists tanks, and to reach high detection efficiency discrimination capability between gamma-ray hadronic showers, different tank designs are under investigation. ...

Quasi-static tests are performed in order to determine the crash behavior of composite tubes. The specimens are made from woven fiber carbon/epoxy. The crash experiments show that the tubes crushed in a progressive manner from one end to the other of the tubes while delamination was taking place between the layers. In the simulation works described in this paper the ANSYS explicit finite elemen...

Radiometric measurements of the microwave emissivity of foam were conducted in May 2000 at the Naval Research Laboratory’s Chesapeake Bay Detachment using radiometers operating at 10.8 and 36.5 GHz. Horizontal and vertical polarization measurements were made at 36.5 GHz; horizontal, vertical, +45, 45, left circular, and right circular polarization measurements were obtained at 10.8 GHz. Surface...

In order to decrease the fluid dynamic forces of the U-bent tube with a circular section and avoid the occurrence of fluid-structure interaction problems, three-dimensional simulations of fluid flows around the tubes are carried out. In the case that the axis of the curved tube with the circular section is prevented from being normal to the direction of the flows approaching the tube, the forma...

• Capillary tubes & SAW devices used to pattern particles in no-flow flowing setups Rectangular tube: particle lines are parallel tube sidewalls for all directions Circular alignment depends on their position along the height Bottom/mid height: parallel/perpendicular direction Continues flow: always flow Acoustofluidic platforms have great potentials integrate capillary controlling and manipula...

A hollow-core fiber using anisotropic anti-resonant tubes in the cladding is proposed for low loss and effectively single-mode guidance. We show that the loss performance and higher-order mode suppression is significantly improved by using symmetrically distributed anisotropic anti-resonant tubes in the cladding, elongated in the radial direction, when compared to using isotropic, i.e. circular...