Results 1 to 10 of about 3,664 (303)

Coronal Heating by Dissipation of Magnetic Structure

Space Science Reviews, 1994
Coronal loops are heated by the release of stored magnetic energy and by the dissipation of MHD waves. Both of these processes rely on the presence of internal structure in the loop. Tangled or sheared fields dissipate wave energy more efficiently than smooth fields.
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Heat Generation and Dissipation

2013
The adverse impact of temperature on device/material reliability has been emphasized often in this book. The degradation rate for most devices/materials tends to accelerate exponentially with increasing temperature. Therefore, for reliability reasons, lower temperature device operation is usually preferred.
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Ceramic simplifies heat dissipation

ATZelektronik worldwide, 2010
LEDs suffer heat problems limiting their success as a light source. Much attention is given to the heatsink, less to the layers and barriers between LED and the heat dissipating surface. A change of concept and material allows significant gains in thermal management and reliability as well as a simplified system.
Armin Veitl, Alexander Dohn
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Dissipative heating in convective flows

Journal of Fluid Mechanics, 1975
Dissipative heating is produced by irreversible processes, such as viscous or ohmic heating, in a convecting fluid; its importance depends on the ratio d/HT of the depth of the convecting region to the temperature scale height. Integrating the entropy equation for steady flow yields an upper bound to the total rate of dissipative heating in a ...
Hewitt, J. M., McKenzie, D. P., Weiss, N. O.   +2 more
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Dissipative heating and hurricane intensity

Meteorology and Atmospheric Physics, 1998
Dissipative heating has not been accounted for in either numerical simulations of hurricanes or in theories for the maximum intensity of hurricanes. We argue that the bulk of dissipative heating occurs in the atmospheric boundary layer near the radius of maximum winds and, using both theory and numerical simulation, show that dissipative heating ...
M. Bister, K. A. Emanuel
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Phonon heat dissipation in silicon

2007 International Semiconductor Device Research Symposium, 2007
Thermal budget is quickly emerging as the prominent limitation on future trends in scaling of semiconductor devices. Detailed understanding of electron-phonon coupling, as well as characteristics of the phonon heat generated by the electron current, such as phonon mode and spectrum, are crucial to our understanding of the micro-scale heating issues in ...
Zlatan Aksamija, Umberto Ravaioli
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Fluctuations, Dissipation and Heating in the Corona

Space Science Reviews, 1999
Mechanisms for the deposition of heat in the lower coronal plasma are discussed, emphasizing recent attempts to reconcile the fluid and kinetic perspectives. Structures at the MHD scales are believed to act as reservoirs for fluctuation energy, which in turn drive a nonlinear cascade process.
W. H. Matthaeus, G. P. Zank, R. J. Leamon, C. W. Smith, D. J. Mullan, S. Oughton   +5 more
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The Dissipation of Heat by Various Surfaces

Transactions of the American Society of Mechanical Engineers, 1920
Abstract This paper is a discussion of the value of sheet asbestos as a covering for hot-air pipes. The author as a result of many experiments found that tin covered with 0.33-mm. (0.013 in.) sheet asbestos will dissipate about 37 per cent more heat than a bare tin pipe; asbestos-covered tin having a layer of dust, 32 per cent more, and ...
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Cellular Mechanisms of Heat Dissipation

1983
The past five years have seen a steadily accelerating advance in our understanding of the mechanisms and scope of mammalian thermogenesis. At the physiological level the recognition that brown fat is the major thermogenic organ not only in hibernators (Smith and Horwitz, 1969) but also in non-hibernators such as the rat (Foster and Frydman, 1978, 1979),
David Nicholls, Rebecca Locke
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Heat dissipation for power switches

2022
Systems, methods, techniques and apparatuses of power switches are disclosed. One exemplary embodiment is a power switch comprising an outer housing; a power electronics board disposed within the housing and including a semiconductor switch structured to selectively conduct a current between a first power terminal and a second power terminal; a first ...
Giovanni Salvatore, Slavo Kicin, Fabian Mohn   +2 more
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