نتایج جستجو برای: thermal flow

تعداد نتایج: 683554  

2017
Haidong Wang Shiqian Hu Koji Takahashi Xing Zhang Hiroshi Takamatsu Jie Chen

Thermal rectification is a fundamental phenomenon for active heat flow control. Significant thermal rectification is expected to exist in the asymmetric nanostructures, such as nanowires and thin films. As a one-atom-thick membrane, graphene has attracted much attention for realizing thermal rectification as shown by many molecular dynamics simulations. Here, we experimentally demonstrate therm...

In the present paper, turbulent convection of CuO-Water Nanofluid in a vertical channel is investigated numerically. In order to simulate the flow, the fluid is considered as a continuous phase while the discrete nanoparticles are dispersed through it. The dispersion of CuO nanoparticles in different flow conditions are studied in order to find the effective mechanisms of particles dispersion i...

ثقفیان, محسن, رجبی, رمضان,

In this paper, viscous dissipation and roughness effects on heat transfer and fluid flow are investigated in microchannels using perturbation method in slip flow regime. The flow is considered to be laminar, developing thermally and hydrodynamically, two-dimensional, incompressible and steady-state. The working fluid is air, flowing between two parallel plates. The equations obtained from devel...

2011
Masakazu Kobayashi Masatake Higashi

1. Abstract Recently there is a growing need for micro water cooling systems with the development of small-sized fuel cells for mobile electric devices. In general, a water cooling system requires a valve for controlling flow rate of coolant in order to keep targeted devices at appropriate working temperature. Traditional type of a flow control valve is driven by an external power source and a ...

Journal: :CoRR 2007
Paolo Bruschi V. Nurra Massimo Piotto

An original packaging method suitable for integrated thermal mass flow sensors is presented. The method consists in the application of a plastic transparent adapter to the chip surface. The adapter is sealed to the chip surface by means of a thermal procedure. By this approach it is possible to selectively convey the fluid flow to reduced chip areas, avoiding contact with the pads. Fabrication ...

Journal: :JCP 2010
Sue Ellen Haupt Robert F. Kunz Leonard Joel Peltier James J. Dreyer

Thermal effects impact the flow around and within structures. This computational study assesses features that affect the heating and buoyancy, and thus, the resulting flow both internal and external to a building. Considerations include the importance of time of day, building materials, sky cover, etc. on the local thermal heating of a passive solar building. Such impacts are assessed using ful...

2010
K. Lafdi R. Harris M. O. Memon

Introduction Heat dissipation is the most critical problem that limits the performance, power, reliability and further miniaturization of microelectronics. The thermal performance of these devices is greatly affected by the thermal resistance associated with interface between the heat sink and heat source. The improvement of a thermal contact is associated with a decrease of the thermal resista...

Journal: :journal of food biosciences and technology 2015
a. ahmadi-dastgerdi a. nasirpour e. rahimi

oil in water emulsions have attracted considerable attention in food industry due to their large applications. in this study, the effect of thermal treatment on oil in water emulsions (o/w) containing 40% oil was studied. the emulsions were prepared using xanthan gum, guar gum and carboxymethyl cellulose as stabilizer and polyoxyethylen sorbitan monooleat as emulsifier. a mixture design was use...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
arezou jafari ali shahmohammadi seyyed mohammad mousavi

in the present attempt, flow behavior and thermal convection of one type of nanofluids in a disc geometry was investigated using computational fluid dynamics (cfd). influence of gravity induced sedimentation also has been studied. the commercial software, fluent 6.2, has been employed to solve the governing equations. a user defined function was added to apply a uniform external magnetic field....

2014
Glenn J. Veeder Ashley Gerard Davies Dennis L. Matson Torrence V. Johnson David A. Williams Jani Radebaugh

We identify nine new faint thermal sources on Io via color ratio images constructed from relatively high spatial resolution Galileo NIMS data acquired late in the mission. All of these identifications are associated with small dark paterae. We utilize NIMS data to quantify their volcanic thermal emission as 0.53 10 W (or 0.5% of Io’s total heat flow). In addition, we refine our previous estimat...

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