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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TL;DR: In this article, an advanced computational fluid dynamics (CFD) model was developed which allows detailed analysis of a direct absorption falling particle receiver with horizontal aperture (face down) for a solar tower plant, including all relevant effects: movement of the particle curtain and the air, solar radiation, thermal radiation transfer, mechanical and thermal interactions between the particles, the air and the walls and conduction through the walls.
63 citations
TL;DR: In this paper, a boundary-driven radiative problem is considered in which the radiation intensities at some areas on a surface are modeled as boundary conditions and maintained at constant values in all angular directions.
Abstract: This paper outlines the formulation of the two-dimensional transient radiation transport through a scattering‐ absorbing medium. The P1 approximation in a Cartesian coordinate system is invoked to simplify the transient radiative transfer equation because it is very complicated to solve in its general form. A boundary-driven radiative problem is considered in which the radiation intensities at some areas on a surface are modeled as boundary conditions and maintained at constant values in all angular directions.
63 citations
62 citations
TL;DR: In this paper, the authors focused on the application of a ceramic tubular high temperature heat exchanger with engineered cellular architectures and found that radial heat transfer in a tube increases by 160% to 280% if a ceramic lattice is inserted, in respect of an empty tube.
62 citations
TL;DR: It is proved that thermal emission from a nanoscale transmission line resonator can always be maximized by tuning the waveguiding loss of the resonator or bending the structure, laying the foundation for designing tunable narrow-band thermal emitters.
Abstract: Thermal radiation with a narrow-band emission spectrum is of great importance in a variety of applications such as infrared sensing, thermophotovoltaics, radiation cooling, and thermal circuits. Although resonant nanophotonic structures such as metamaterials and nanocavities have been demonstrated to achieve the narrow-band thermal emission, maximizing their radiation power toward perfect emission still remains challenging. Here, based on the recently developed quasi-normal mode theory, we prove that thermal emission from a nanoscale transmission line resonator can always be maximized by tuning the waveguiding loss of the resonator or bending the structure. By use of nanoscale transmission line resonators as basic building blocks, we experimentally demonstrate a new type of macroscopic perfect and tunable thermal emitters. Our experimental demonstration in conjunction with the general theoretical framework from the quasi-normal mode theory lays the foundation for designing tunable narrow-band thermal emit...
62 citations