The Direct Simulation Monte-Carlo technique (DSMC) is used for numerical analysis of rarefied-gas hypersonic flows near a blunt plate, wedge, two side-by-side plates and cylinders, sphere, torus, and rotating cylinder. Important kinetic effects that are specific for the transition flow regime have been found: nonmonotonic lift of plates, strong repulsive force between side-by-side plates and cy...

The majority artificial lift used in MPA Field use PCTGL (Permanent coil tubing gas lift). is installed on several monobore well or dual well. Some wells the have waxy HPPO oil character with pour point between 85-100oF API 30-35. "MM-1" has a 95oF. high Pour of will be problem to solved. MM-1 produced PCTGL. From simulation, design was obtained at depth 2250 ft. With oil, depressant injection ...

The main advantage of tail-sitter unmanned aerial vehicle (UAV) are introduced. Three design solutions of rotor tailsitter lift system of UAV have been presented and the respective control strategies and characteristics of three solutions are also analyzed in the paper, through the related experiments the design of twin-rotor lift system is verified, and its feasibility is proved. The character...

abstract: in this paper, optimization of boeing 747 wing has been accomplished for cruise condition (mach number=0.85, flight altitude=35000 ft), where an optimal wing shape is proposed. objective functions are minimization of wing weight and drag force that as well as confining design parameters, two functional constrains are applied. the first functional constrain is fuel tank volume in the a...

STATEMENT OF PROBLEM Speech bulbs and palatal lift prostheses are used to improve oral-nasal balance in speakers with hypernasality resulting from velopharyngeal dysfunction. Fabricating such speech prostheses is often a protracted process, and the nasopharyngeal impression can be uncomfortable for the client. PURPOSE The purpose of this study was to develop and test a modular palatal lift pr...

The interfacial area transport equation for a subcooled boiling flow is developed with a mechanistic model for the wall boiling source term. It includes the bubble lift-off diameter model and the lift-off frequency reduction factor model. Those models take into account a bubble’s sliding on the heated wall after a departure from the nucleate site and the coalescences of sliding bubbles. To impl...

The ageing population is becoming a growing challenge to society. User-centered ICT solutions adapted to elderly can play a prime role in dealing with these challenges. This paper presents TV-kiosk, an open and extensible TV-based platform that aims to stimulate social interaction, avoid isolation and deliver information. One of its distinguishing features is the underlying decentralized networ...