Zobrazeno 1 - 10
of 217
pro vyhledávání: '"Ralph Greif"'
Publikováno v:
Journal of Thermal Science and Technology, Vol 3, Iss 3, Pp 410-420 (2008)
This study investigated the behavior of pressure drops and heat transfer coefficients for four sets of triangular microchannels. Results of this study indicated that for Reynolds numbers less than 100, the Nusselt number tends to be nearly linearly i
Externí odkaz:
https://doaj.org/article/0eec340bdd39499bbaecc44c4e3d3f7c
Publikováno v:
International Journal of Heat and Mass Transfer. 109:1031-1043
In the present work, a novel multi-nozzle microchannel heat exchanger (MN-MCHX) was proposed. The effects of the channel depth ratio, channel length ratio, inlet temperature of the hot fluid, and pumping power on thermodynamic properties of the MN-MC
Publikováno v:
International Journal of Heat and Mass Transfer. 105:429-442
In this study, a copper plate measuring 9.8 mm × 9.8 mm × 0.5 mm was used as a fixed substrate for designs with single-layer-and-parallel or multi-nozzle microchannel heat sinks. Water was applied as the coolant. Channel lengths from 0.2 to 5.6 mm
Publikováno v:
International Journal of Heat and Mass Transfer. 101:656-666
In the present study, a novel multi-nozzle microchannel heat sink (MN-MCHS) was proposed. The channel length, channel aspect ratio, rib width, pumping power, and heat flux were numerically investigated in detail. It was found that the MN-MCHS with a
Autor:
Yi-fu Lian, Chun-ping Zhang, Ralph Greif, Cheng-Hsing Hsu, Jyh-tong Teng, Sheng Liu, Yaw-Jen Chang
Publikováno v:
International Journal of Heat and Mass Transfer. 85:723-731
In this work, the secondary flow and recirculation flow motions initiated at the bifurcations and bends in symmetric fractal-like microchannel networks with two branching levels were studied through three-dimensional simulations. The effects of Reyno
Publikováno v:
International Journal of Hydrogen Energy. 39:2008-2017
Microreactors have important advantages due to the increased heat and mass transfer resulting from the small dimensions of the system. This results in enhanced performance and efficiency. Microreformers with wall-coated or suspended catalytic layer c
Autor:
Ming-Tsang Lee, Jyh-tong Teng, Chao Liu, Chen Chen, Ching-hung Cheng, Shiping Jin, Suyi Huang, Hsin-Hung Pan, Ralph Greif
Publikováno v:
International Journal of Heat and Mass Transfer. 69:203-214
Based on our previous study, experiments were conducted to explore frictional pressure drop and heat transfer performance of de-ionized water flowing through rectangular microchannels having longitudinal vortex generators (LVGs). The experimental inv
Autor:
Samuel S. Mao, Ian D. Sharp, Wladek Walukiewicz, M. Jaquez, Ralph Greif, Yifan Ye, M. Ting, Chao Ping Liu, Natalie Segercrantz, Kin Man Yu
Publikováno v:
Journal of Applied Physics. 125:155702
We have synthesized ZnO1−xTex highly mismatched alloys (HMAs) with high, up to x = 0.34, Te content using pulsed laser deposition. We have found that the film composition is strongly dependent on the growth temperature and background pressure durin
Autor:
Yi-fu Lian, Chun-ping Zhang, Wei Liu, Xiangfei Yu, Ting-ting Xu, Cheng-Hsing Hsu, Ralph Greif, Jyh-tong Teng, Yaw-Jen Chang
Publikováno v:
International Journal of Heat and Mass Transfer. 66:930-938
In this paper, the conventional equivalent method and the subsectional integral method were used to analyze the friction factor and the Nusselt number in fractal-like microchannel networks. The calculated results obtained from the two methods were co
Autor:
Yaw-Jen Chang, Jyh-tong Teng, Ting-ting Xu, Xiangfei Yu, Ralph Greif, Cheng-Hsing Hsu, Yi-fu Lian, Chun-ping Zhang, Wei Liu
Publikováno v:
International Journal of Heat and Mass Transfer. 66:939-947
In the present paper, the numerical simulations and experiments were carried out to explore the laminar hydrodynamic and thermal characteristics in the symmetrical fractal-like microchannel networks, and the pressure drop and heat transfer for the ne