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, a nongray radiation heat transfer analysis for problem situations involving molecular gases with infrared vibration rotation bands when the gaseous mixture is in a state corresponding to thermodynamic equilibrium at the local thermodynamic state variables: pressure, temperature, and composition.
Abstract: Publisher Summary Radiation heat transfer involving molecular gases is the desirable effect in fossil-fuel or waste-fired steam generators for power production or process steam supply and in industrial heat-treating, melting, or enameling furnaces Heat radiation from gases may be utilized as a means of heat transfer and also of information transfer Information on the location, extent, composition, and temperature of a volume of molecular gases can be inferred from thermal radiation measurements The information obtained can be used by process control, fire and air pollution warning and monitoring systems, and by weapon and brush-fire-suppressant targeting or guidance systems This chapter examines how to make a nongray radiation heat transfer analysis for problem situations involving molecular gases with infrared vibration rotation bands when the gaseous mixture is in a state corresponding to thermodynamic equilibrium at the local thermodynamic state variables: pressure, temperature, and composition The special circumstances under which total emissivity and total absorptivity appear as useful quantities are derived, and approximations extending their utility are discussed The chapter examines how the more general and difficult problem of a nonisothermal gas is treated Some particular solutions for the parallel-plate duct are described, both to illustrate nonisothermal gas analysis and to obtain wall-layer transmission factors to extend the utility of engineering models employing an isothermal gas volume concept The chapter provides a brief description of the experimental knowledge of molecular gas behavior and a review of the fundamental ideas of radiation transfer The spectral band nature of gas radiation is briefly described and correlations for working calculations of gas radiation properties are presented
291 citations
TL;DR: In this article, a numerical analysis for flow and heat transfer in a viscous fluid over a sheet nonlinearly stretched by extending the investigation in two directions is presented, on one side, the effects of thermal radiation are included in the energy equation, and on the other hand, the prescribed wall heat flux case (PHF case) is also analyzed.
290 citations
TL;DR: In this article, a three-dimensional flow of couple stress nanofluid in the presence of thermophoresis and Brownian motion effects is analyzed and the energy equation subject to nonlinear thermal radiation is taken into account.
289 citations
TL;DR: In this article, the combined free convection boundary layer flow with thermal radiation and mass transfer past a permeable vertical plate was studied when the plate was maintained at a uniform temperature with uniform species concentration and the fluid was considered to be gray, absorbing-emitting.
285 citations
TL;DR: In this paper, a comprehensive investigation of the radiation energy transfer between two semi-infinite parallel plates at different temperatures, involving silicon with varying dopant concentrations, when the distance of separation is from 10μm down to 1nm, is presented.
285 citations