In this study, the supersonic and choked subsonic flows through micro/nano channels are investigated using direct simulation Monte Carlo (DSMC) method. The supersonic case is simulated at different Knudsen numbers covering slip to transition flow regimes, while the effects of inlet Mach and back pressure are studied in details. The inlet/outlet pressure boundary conditions are suitably implemen...

This paper presents an alternative model to deal with the problem of optimal energy consumption minimization of non-isothermal systems with variable inlet and outlet temperatures. The model is based on an implicit temperature ordering and the "transshipment model" proposed by Papoulias & Grossmann (1983). It is supplemented with a set of logical relationships related to the relative position of...

This paper presents a reciprocating air microcompressor with a piston diameter of 1 mm. A microcompressor construction is proposed aiming at simple fabrication with lots of space for installing inlet and outlet ports. The inlet port of the microcompressor does not have a moving valve, while the outlet port is equipped with a miniature reed valve. The compression process was numerically modelled...

A rise in inlet air temperature may lower the rate of heat dissipation from air cooled computing servers. This introduces a thermal stress to these servers. As a result, the poorly cooled active servers will start conducting heat to the neighboring servers and giving rise to hotspot regions of thermal stress, inside the data center. As a result, the physical hardware of these servers may fail, ...

Precise prediction of particulate movement is needed to provide a better understanding of how airborne disease organisms move within ventilated facilities. Bacteria often adhere to larger airborne particulates, which will modify their movement behavior in ventilated rooms and may provide an environment to allow them to remain virulent longer. An empty chamber (206 H x 203 W x 386 cm L) with a c...

Lymphangions, the segments of lymphatic vessels between valves, exhibit structural characteristics in common with both ventricles and arteries. Although once viewed as passive conduits like arteries, it has become well established that lymphangions can actively pump lymph against an axial pressure gradient from low-pressure tissues to the great veins of the neck. A recently reported mathematica...

Questions: Does gene flow constrain adaptation in nature? Does spatial variation in selection make it difficult to detect the role of gene flow? Data description: Variation in the adaptive morphology of threespine stickleback (Gasterosteus aculeatus) from multiple sites in each of three environments: Misty Lake, an inlet stream flowing into Misty Lake, and an outlet stream flowing out of Misty ...

........................................................................................................................... iii ACKNOWLEDGMENTS ......................................................................................................... vi LIST OF TABLES .................................................................................................................... ix LIST OF F...

monitoring the effective parameters of drying crops is necessary to evaluate and determine system performance under real conditions. hence, a monitoring system was constructed to determine the performance of a vegetation forced-convection solar dryer. digital temperature sensors were set up in the air inlet and outlet of the collector and the air outlet of the drying chamber. a program was writ...