Journal of heat transfer : transactions of the ASME, Vol. 134 N° 5. Journal of heat transfer (Transactions of the ASME) - Mai 2012
| Titre : | Journal of heat transfer : transactions of the ASME, Vol. 134 N° 5. Journal of heat transfer (Transactions of the ASME) - Mai 2012 |
| Type de document : | Bulletin |
| Paru le : | 12/09/2012 |
Dépouillements
Article : texte imprimé
This paper quantifies the influence of diamond nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, and flat surface. Nanofluids are liquids that contain dispersed nanosize particles. A lubrican[...]
Article : texte imprimé
Clement Kleinstreuer, Auteur ;
Yu Feng, Auteur
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This is a two-part paper, which proposes a new theory explaining the experimentally observed enhancement of the thermal conductivity, knf, of nanofluids (Part I) and discusses simulation results of nanofluid flow in a radial parallel-plate chann[...]
Article : texte imprimé
Yu Feng, Auteur ;
Clement Kleinstreuer, Auteur
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This is the second part of a two-part paper which proposes a new theory explaining the experimentally observed enhancement of the thermal conductivity, knf, of nanofluids (Part I) and discusses simulation results of nanofluid flow in an axisymme[...]
Article : texte imprimé
Hai-Dong Wang, Auteur ;
Bing-Yang Cao, Auteur ;
Zeng-Yuan Guo, Auteur
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Fourier's law is a phenomenological law to describe the heat transfer process. Although it has been widely used in a variety of engineering application areas, it is still questionable to reveal the physical essence of heat transfer. In order to [...]
Article : texte imprimé
Weizhong Dai, Auteur ;
Da Yu Tzou, Auteur
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We consider the generalized micro heat transfer model in a 1D microsphere with N-carriers and Neumann boundary condition in spherical coordinates, which can be applied to describe nonequilibrium heating in biological cells. An accurate Crank–Nic[...]
Article : texte imprimé
D. Y. Tzou, Auteur
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The lagging behavior is first exemplified by a rapidly stretched spring and a one-dimensional fin to illustrate the phase-lag concept via the thermal and mechanical properties that most engineers are familiar with. The second-order lagging model[...]
Article : texte imprimé
David Lacroix, Auteur ;
Karl Joulain, Auteur ;
Jerome Muller, Auteur
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This study deals with phonon heat transport in silicon nanowires. A review of various methods that can be used to assess thermal conductance of such nanodevices is presented. Here, a specific attention is paid to the case of the Landauer Formali[...]
Article : texte imprimé
Ichiro Ueno, Auteur ;
Kanji Hirose, Auteur ;
Yusuke Kizaki, Auteur
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The authors pay their special attention to formation process of wafer-thin liquid film, known as “precursor film,” ahead moving macroscopic contact line of a droplet spreading on a solid substrate. The spreading droplet on the solid substrate is[...]
Article : texte imprimé
Mitsuhiro Matsumoto, Auteur ;
Masaya Okano, Auteur ;
Yusuke Masao, Auteur
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Analysis of phonon dynamics based on a linearized Boltzmann transport equation is widely used for thermal analysis of solid thin films, but couplings among various phonon modes appear in some situations. We propose a direct simulation Monte Carl[...]
Article : texte imprimé
Zeng-Yuan Guo, Auteur ;
Quan-Wen Hou, Auteur ;
Bing-Yang Cao, Auteur
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Design and construction of nanomotors are one of the most attractive fields in nanotechnology. Following the introduction of a novel concept of the thermomass, the relative mass of a phonon gas based on the Einstein's energy–mass relation, the c[...]
Article : texte imprimé
Yongping Chen, Auteur ;
Chengbin Zhang, Auteur ;
Panpan Fu, Auteur
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The fractal characterization of surface topography by using Cantor set structures is introduced to quantify the microchannel surface. Based on this fractal characterization of surface, a model of laminar flow in rough microchannels is developed [...]
Article : texte imprimé
Vinh-Nguyen Phan, Auteur ;
Nam-Trung Nguyen, Auteur ;
Chun Yang, Auteur
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Nanofluidics is the science and technology involving a fluid flowing in or around structures with a least one dimension in the nanoscale, which is defined as the range from 1 nm to 100 nm. In this paper, we present the fabrication and characteri[...]
Article : texte imprimé
Theoretical two-dimensional modeling of gas conduction between finite parallel plates in high vacuum
Taishan Zhu, Auteur ;
Wenjing Ye, Auteur
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A theoretical approach based on gaskinetic theory is described and applied for the modeling of steady-state free-molecule gaseous heat conduction within a diffusive enclosure. With a representative model of microelectromechanical system (MEMS) d[...]
Article : texte imprimé
Shasha Wang, Auteur ;
Xiaoyang Huang, Auteur ;
Chun Yang, Auteur
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We demonstrate the bubble generation in a microfluidic channel by both experimental observation and numerical simulations. The microfluidic channel contains a nozzle-shaped actuation chamber with an acoustic resonator profile. The actuation is g[...]
Article : texte imprimé
Sang M. Kwark, Auteur ;
Ratan Kumar, Auteur ;
Gilberto Moreno, Auteur
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This study shows the transient characteristics of the pool boiling curves using nanofluid as the boiling fluid. This time-dependency is in sharp contrast to a unique steady-state pool boiling curve that is typically obtained for a pure fluid. Pa[...]
Article : texte imprimé
Yiding Cao, Auteur ;
Jian Ling, Auteur
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With a substantially increased gas inlet temperature in modern gas turbines, the cooling of turbine disks is becoming a challenging task. In order to reduce the temperature at the disk rim, a new turbine disk incorporating radially rotating heat[...]
Article : texte imprimé
Avram Bar-Cohen, Auteur ;
Peng Wang, Auteur
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The rapid emergence of nanoelectronics, with the consequent rise in transistor density and switching speed, has led to a steep increase in microprocessor chip heat flux and growing concern over the emergence of on-chip hot spots. The application[...]
Article : texte imprimé
Koji Miyazaki, Auteur ;
Saburo Tanaka, Auteur ;
Daisuke Nagai, Auteur
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In this study, we introduce our numerical and experimental works for the thermal conductivity reduction by using a porous material. Recently thermal conductivity reduction has been one of the key technologies to enhance the figure of merit (ZT) [...]
Article : texte imprimé
E. Da Riva, Auteur ;
D. Del Col, Auteur
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A three-dimensional volume of fluid (VOF) simulation of condensation of R134a inside a 1 mm i.d. minichannel is presented. The minichannel is horizontally oriented and the effect of gravity is taken into account. Simulations have been run both w[...]
Article : texte imprimé
Moran Wang, Auteur
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The structure effects on electro-osmosis in microporous media have been studied by modeling the multiphysical transport using our numerical framework. The three-dimensional microstructures of porous media are reproduced by a random generation-gr[...]
Article : texte imprimé
Stefano Nebuloni, Auteur ;
John R. Thome, Auteur
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This paper presents numerical simulations of annular laminar film condensation heat transfer in microchannels of different internal shapes. The model, which is based on a finite volume formulation of the Navier–Stokes and energy equations for th[...]
Article : texte imprimé
Wei Xu, Auteur ;
Chang-Hwan Choi, Auteur
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In this paper, the evaporation kinetics of microliter-sized sessile droplets of gold colloids (~250 nm in particle diameters) was experimentally studied on micropatterned superhydrophobic surfaces, compared with those of pure water on a planar h[...]
Article : texte imprimé
Rong Xiang, Auteur ;
Erik Einarsson, Auteur ;
Junichiro Shiomi, Auteur
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Feedstock diffusion and decomposition in the root growth of aligned carbon nanotube (CNT) arrays is discussed. A nondimensional modulus is proposed to differentiate catalyst poisoning controlled growth deceleration from one which is diffusion co[...]
Article : texte imprimé
Shigeo Maruyama, Auteur ;
Rong Xiang, Auteur
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Vertically aligned single-walled carbon nanotubes (VA-SWNTs) is expected to be an extra-ordinal material for various optical, electrical, energy, and thermal devices. The recent progress in growth control and characterization techniques will be [...]
Article : texte imprimé
Masahiro Motosuke, Auteur ;
Jun Shimakawa, Auteur ;
Dai Akutsu, Auteur
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Optical force offers a promise of being applied as a noninvasive manipulation tool for microscopic objects without physical contact. Particle control in a microfluidic system is achieved by optics showing advantages over electric or the other me[...]
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