Transient Temperature Distribution of a Multilayer Composite Wall With Effects of Internal Thermal Radiation and Conduction

Tsai, Ching-Fen; Nixon, Gene

doi:10.1080/10407788608913510

Cited by 39 publications

(5 citation statements)

References 1 publication

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“…Tsai and Nixon (1986) investigated the transient temperature distribution in a multilayer composite, semitransparent or transparent, absorbing and emitting medium exposed to a thermal radiative heat flux. The governing conditions with the initial and boundary conditions in consideration of the effects of both thermal radiation and conduction within each layer and convection on both exterior surfaces were solved by a hybrid numerical algorithm, using a 4th‐order explicit Runge–Kutta method for the time variable and a finite difference method for the space variable.…”

Section: Introductionmentioning

confidence: 99%

Infrared Heating in Food Processing: An Overview

Krishnamurthy¹,

Khurana²,

Soojin³

et al. 2008

Comp Rev Food Sci Food Safe

353

176

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Infrared (IR) heating provides significant advantages over conventional heating, including reduced heating time, uniform heating, reduced quality losses, absence of solute migration in food material, versatile, simple, and compact equipment, and significant energy saving. Infrared heating can be applied to various food processing operations, namely, drying, baking, roasting, blanching, pasteurization, and sterilization. Combinations of IR heating with microwave heating and other common conductive and convective modes of heating have been gaining momentum because of increased energy throughput. This article reviews aspects of IR heating and presents a theoretical basis for IR heat processing of food materials and the interaction of IR radiation with food components. The effect of IR on food quality attributes is discussed in the context of samples and process parameters. Applications of IR heating in food processing operations and future research potential are also reviewed.

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Section: Introductionmentioning

confidence: 99%

Infrared Heating in Food Processing: An Overview

Krishnamurthy¹,

Khurana²,

Soojin³

et al. 2008

Comp Rev Food Sci Food Safe

353

176

View full text Add to dashboard Cite

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“…The heat transfer sub-model Thin Wall (Tsai and Nixon, 1986) in the AVL Fire TM code serves to reproduce the unsteady cooling occurring during the spray-wall impact. The thickness of the solid is assumed small compared with its lateral extensions and with its radius of curvature.…”

Section: Resultsmentioning

confidence: 99%

Schlieren and Mie scattering techniques for the ECN “spray G” characterization and 3D CFD model validation

Piazzullo

Costa

Allocca

et al. 2018

HFF

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Purpose This paper aims to study the heat transfer phenomenon occurring between heated walls and impinging fuel, showing the strict relationship between cooling effect after impingement and enhancing of wallfilm formation. The study focuses on a fundamental task in terms of pollutant emissions in internal combustion engines, aiming at giving a major contribution to the optimization of energy conversion systems in terms of environmental impact. Design/methodology/approach The paper is based on experimental campaigns relevant at taking measurements of an impinging spray over a heated wall in a confined vessel. The results, in both qualitative and quantitative terms (measurements of liquid and vapour radial penetration and thickness), are numerically reproduced by a computational model based on a Reynolds Averaged Navier Stokes approach, properly validated through customized sub-models. Findings The paper provides quantitative results about the agreement between radial penetration and vapour thickness between measurements and simulation, achieved by taking into account the cooling effect determined by the fuel impingement. This validation of the numerical model allows the author to give more considerations about the link between wall temperature and wallfilm formation. Originality/value This paper presents an original approach for the simulation of wall heat transfer, by imposing a boundary condition at the wall that may consider the heat conduction and temperature cooling given by fuel impingement in both lateral and normal directions. The classical Dirichlet boundary condition, characterized by imposing a fixed temperature value, is, instead, replaced by an approach based on calculating the unsteady process that couples the heat fluxes between the fluid and the solid material and within the solid itself.

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“…Lists of previous works on combined radiation and conduction heat transfer can be found in a review article8 and a textbook 9. Although there have been far fewer studies of transient behavior, existing works have analyzed a variety of situations for single and multiple layers 10–18. Several excellent reviews on radiation and combined radiation and conduction energy transfer in dispersed media are available 19–22.…”

Section: Introductionmentioning

confidence: 99%

Finite difference solution for a transient temperature distribution in an advanced polymer fiber

Sadooghi

Aghanajafi

2006

J of Applied Polymer Sci

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ABSTRACT:A model is presented for the calculation of transient combined radiative and conductive heat transfer in a semitransparent layer of advanced fiber polymer. This model is based on optical material properties. Different boundary conditions were examined. Each side of the layer was exposed to hot or cold radiative surroundings, whereas each boundary was heated or cooled by convection. Emission within the layer and internal reflections depended on the layer refractive index. The reflected energy and heat conduction distributed energy across the layer and partially equalized the transient temperature distributions. The numerical method is an implicit finite difference procedure with nonuniform space and time increments that has been expanded to include external convection and incident radiation.

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Transient Temperature Distribution of a Multilayer Composite Wall With Effects of Internal Thermal Radiation and Conduction

Cited by 39 publications

References 1 publication

Infrared Heating in Food Processing: An Overview

Infrared Heating in Food Processing: An Overview

Schlieren and Mie scattering techniques for the ECN “spray G” characterization and 3D CFD model validation

Finite difference solution for a transient temperature distribution in an advanced polymer fiber

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