An axial oscillation tool is proved to be effective in solving problems associated with high friction and torque in the sliding drilling of a complex well. The fluidic axial oscillation tool, based on an output-fed bistable fluidic oscillator, is a type of axial oscillation tool which has become increasingly popular in recent years. The aim of this paper is to analyze the dynamic flow behavior ...

plate heat exchangers are widely used in industries due to their special characteristics, such as high thermal efficiency, small size, light weight, easy installation, maintenance, and cleaning. the purpose of this study is to consider the effect of depth, angle, and pitch of hemispheric chevrons on the convective heat transfer coefficient and pressure drop. in the simulation of the heat exchan...

We report a C2 tear-drop fracture of a 69-year-old patient which occurred after a fall. Although tear drop fractures of the subaxial cervical spine mostly develop due to a flexion type injury, the mechanism is often compressive hyperextension injury at the C2 vertebra. Rigid external stabilization and internal fixation are the treatment alternatives. Internal fixation may be performed using the...

introduction increasing the area of absorber plate between the flowed air through the duct can be accomplished by corrugating the absorber plate or by using the artificial roughness underside of the absorber plate as the commercial methods for enhancing the thermohydraulic performance of the flat plate solar air heaters. evaluation of this requires the construction of separated solar air heater...

The performance of the solar collector can be reviewed based on several parameters, namely thermal and large fluid drop (pressure drop). This study aims to compare pressure plate-type collectors a spiral-shaped pipe arrangement using distance between pipes. comparison analyzed in each for pipes is 25 mm 50 mm. approach or stage research data plate type through CFD simulation testing. stages tha...

The hanging drop tissue culture is a technique utilized in embryology [4] and other fields to allow growth that would otherwise be restricted by the flat plane of culture dishes and also to minimize the surface area to volume ratio, slowing evaporation. The classic hanging drop culture is a small drop of liquid, such as plasma or some other media allowing tissue growth, suspended from an invert...