Results 261 to 270 of about 203,544 (317)
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On the Calculation of Efficiencies and Costs in Thermal Systems
Advanced Energy Systems, 1999Abstract This paper is an extension, generalization and simplification of a concept presented in two previous papers. A general method for defining and calculating exergetic efficiencies and exergy-related costs in thermal systems is presented.
LAZZARETTO, ANDREA, G. TSATSARONIS
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Correlation Function Calculation of Thermal Conductivity
Physical Review, 1962Recent theories of transport in fluids express the thermal conductivity in terms of correlation functions of the thermal flux. It is shown that such an expression for the thermal conductivity reduces to that conventionally obtained by use of the Boltzmann transport equation for phonon scattering in crystals, if the rate of change of phonon occupation ...
Schieve, William C., Peterson, Robert L.
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Communications in Applied Numerical Methods, 1986
AbstractLeast squares smoothing is applied to thermal strain calculation. The smoothing procedure eliminates apparent errors in thermal stresses due to mismatch of thermal and mechanical strain orders which facilitates direct evaluation of results. General procedures are developed and demonstrated for two‐dimensional isoparametric elements.
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AbstractLeast squares smoothing is applied to thermal strain calculation. The smoothing procedure eliminates apparent errors in thermal stresses due to mismatch of thermal and mechanical strain orders which facilitates direct evaluation of results. General procedures are developed and demonstrated for two‐dimensional isoparametric elements.
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2010
Model calculations are made to obtain for certain load cases information on the thermal behavior of a telescope, or a telescope and its enclosure or of a specific structural component. The temperatures predicted from model calculations are used for design and/or operational purposes.
Albert Greve, Michael Bremer
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Model calculations are made to obtain for certain load cases information on the thermal behavior of a telescope, or a telescope and its enclosure or of a specific structural component. The temperatures predicted from model calculations are used for design and/or operational purposes.
Albert Greve, Michael Bremer
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Calculation of thermal noise in j.f.e.t.s
IEE Journal on SolidState and Electron Devices, 1979At frequencies above the range at which low-frequency-generation noise is dominant, thermal noise in the channel is the main noise source of a junction field-effect transistor. Starting from the well known current and continuity equations, the drain- and gate-noise spectra and their correlation coefficient are calculated by means of a series expansion,
D. Schröder, G. Weinhausen
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CALCULATION OF THERMAL RESISTANCE AT THE BOUNDARY
Mathematical modeling in materials science of electronic component, 2023This paper presents the result of calculating the thermal resistance (Kapitza resistance) for the Si/SiO2(α-quartz) interface using acoustic and diffuse misfit models. The results obtained were verified using data from published articles, which made it possible to generally judge the adequacy of the models used.
Karine Abgaryan, Ilya Kolbin
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Thermal Calculations for Bridge Design
Journal of the Structural Division, 1975A straightforward method is shown for calculating thermal stresses in bridges. Unsteady temperature distributions are obtained from numerical solutions of the one-dimensional unsteady heat equation, and comparison with experiment seems to validate the simplifying assumption that horizontal heat movements are small enough to be ignored.
Bruce Hunt, Nigel Cooke
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1993
Inactivation of microorganisms by heat is a fundamental operation in food preservation. The concepts presented in this chapter are applicable not only in canning but in any process where heat is used to inactivate microorganisms and induce chemical changes which affect quality.
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Inactivation of microorganisms by heat is a fundamental operation in food preservation. The concepts presented in this chapter are applicable not only in canning but in any process where heat is used to inactivate microorganisms and induce chemical changes which affect quality.
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Resonance absorption calculations in thermal reactors
Progress in Nuclear Energy, 1980Publisher Summary The calculation of resonance absorption rates in nuclear reactor cores has long been recognized as one of the most complicated parts of reactor analysis on account of the large number of nuclides with pronounced resonances that are present in the fuel and the drastic cross-section changes that occur in each resonance, sometimes over
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Calculations of the thermal boundary resistance
Physical Review B, 1977A comparison is made of two versions of the acoustic-mismatch theory of the thermal boundary resistance R which occurs at the interface between a pair of solids. The most recent version predicts R ..-->.. 0 as the two solids become identical, while the earlier version indicates a finite R as the interface essentially vanishes.
J. A. Katerberg +2 more
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