Topic
Thermal radiation
About: Thermal radiation is a research topic. Over the lifetime, 12290 publications have been published within this topic receiving 197186 citations. The topic is also known as: heat radiation.
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01 Apr 2012
TL;DR: In this paper, the dependence of near-�eld heat exchange on doping and electron relaxation time is analyzed in the near infrared within the framework of uctuational electrodynamics.
Abstract: It is shown that thermally excited plasmon- polariton modes can strongly mediate, enhance, and tune the near-field radiation transfer between two closely separated graphene sheets. The dependence of near-field heat exchange on doping and electron relaxation time is analyzed in the near infrared within the framework of fluctuational electrodynamics. The dominant contribution to heat transfer can be controlled to arise from either interband or intraband processes. We predict maximum transfer at low doping and for plasmons in two graphene sheets in resonance, with orders-of- magnitude enhancement (e.g., 10^2 to 10^3 for separations between 0.1 μm and 10 nm) over the Stefan-Boltzmann law, known as the far-field limit. Strong, tunable, near-field transfer offers the promise of an externally controllable thermal switch as well as a novel hybrid graphene- graphene thermoelectric/thermophotovoltaic energy conversion platform.
158 citations
TL;DR: In this paper, the influence of carbon nanotubes in the Marangoni convection boundary layer flow of viscous fluid has been investigated and convergent series solutions are established for the resulting differential systems.
158 citations
TL;DR: The main problem in the application of radiation pyrometry to the measurement of true surface temperatures is the large error arising from the unknown or varying emissivity of the surface.
Abstract: The main problem in the application of radiation pyrometry to the measurement of true surface temperatures is the large error arising from the unknown or varying emissivity of the surface. The nature of the additional information required for the class of techniques which utilize only the thermal radiation emitted from the surface is discussed. The suggestions that multi-wavelength pyrometry, requiring measurements at many different wavelengths, may be employed to solve the problem without additional information are analyzed, and shown to possess distinct disadvantages.
158 citations
TL;DR: In this paper, the authors studied the Laminar free convection flow of air past a semi-infinite vertical plate in the presence of chemical species concentration and thermal radiation effects, and the governing boundary-layer equations for this problem are reduced to a non-similar form and are solved numerically by an implicit finite-difference technique.
158 citations
TL;DR: In this paper, a numerical investigation of free convection in a rectangular enclosure has been carried out based on Gosman's finite volume method with a 21 × 21 non-uniform grid, and a radiation model has been included in the analysis to study the effect of surface radiation on the heat transfer characteristics of the enclosure.
158 citations