Efficient evaluation of diffuse view factors for radiation

Rao, V.V. Bapeswara; Sastri, V. M. K.

doi:10.1016/0017-9310(95)00203-0

Cited by 36 publications

(9 citation statements)

References 6 publications

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“…L'introduction des méthodes d'intégrations numériques [9,10] et probabilistes [11] ont permis de surmonter ces difficultés, pour des formes arbitraires des émet-teurs et récepteurs. Dans le cas d'intégration numérique, les formulations utilisées peuvent être classées en deux catégories : (i) formulation intégrale surfacique et (ii) formulation intégrale de contour.…”

Section: Surfaces De Radiations Mutuellesunclassified

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Modélisation par éléments finis du chauffage infrarouge des membranes thermoplastiques semi-transparentes

Erchiqui¹,

Hamani²,

Charette³

2009

International Journal of Thermal Sciences

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Section: Surfaces De Radiations Mutuellesunclassified

“…Les intégrales de surface qui interviennent dans (36) peuvent être remplacées par des intégrales de contour, en utilisant le théorème de Stockes [10] :…”

Section: L'approche Semi-analytiqueunclassified

Modélisation par éléments finis du chauffage infrarouge des membranes thermoplastiques semi-transparentes

Erchiqui¹,

Hamani²,

Charette³

2009

International Journal of Thermal Sciences

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“…One of the more efficient approaches for thermal radiation analysis is the Monte Carlo (MC) method because of its ability to tackle complex problems with relative ease compared to other numerical techniques [12][13][14][15][16][17][18][19]. Generally, undergraduate students are not exposed to stochastical techniques, although their implementation is quite intuitive and does not require beyond the physics of the problem at hand along with a standard background in statistics.…”

Section: Module Ii: Radiative Heat Transfermentioning

confidence: 99%

Simulation Versus Design: Two Case Studies in Chemical Reaction Kinetics and Radiative Heat Transfer

Henda¹

2011

PCEEA

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This paper describes two instructional modules pertaining to engineering design education and developed via two design approaches. The first module concerns itself with experimental simulation of chemical reaction kinetics using the analogy with the free-fall of a non-viscous liquid in ducts of various shapes. The second module is concerned with computer simulation of heat exchange via thermal radiation in a 3-D enclosure with nontrivial features. Both modules involve a series of case studies to enhance students understanding of the engineering concepts under consideration and to expose them to the power of both experimental and computer designs.

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“…In our model, we assume a constant filament temperature and then a uniform source temperature. Thus the amount of radiation, reaching each front elements of the irradiated sheet, is performed with the contour method using Stokes theorem [10]:…”

Section: Numerical Modellingmentioning

confidence: 99%

Modelling of infrared heating of thermoplastic sheet used in thermoforming process

Schmidt

2003

Journal of Materials Processing Technology

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Thermoforming consists of warming a plastic sheet and forming it into a cavity or over a tool using vacuum, air pressure and mechanical means. The process begins by heating a thermoplastic sheet slightly above the glass transition temperature, for amorphous polymers, or slightly below the melting point, for semi-crystalline materials. As the final thickness distribution of the part is drastically controlled by the initial temperature distribution inside the sheet, it is very important to optimise the heating stage. In most of the thermoforming machine, this step is performed using an infrared oven constituted of long waves infrared emitters. The goal of this study is to determine the efficiency of short waves infrared emitters (halogen lamps) for the heating step. The infrared heating of thermoplastic sheets will be modelled following two steps: an experimental setup developed in our laboratory permits to measure the influence of parameters such as heaters temperature, incidence of the radiation, heat transfer coefficient, etc. An 880 LW AGEMA infrared camera is used to evaluate the surface distribution of the transmitted heat flux by measuring the temperature distribution on the surface of the thermoplastic sheet. In addition, a numerical model using control volume method (software called PLASTIRAD) has been developed to simulate the heating stage. In particular, it takes into account the spectral properties of both heaters and plastic sheet as well as the heaters directivity. Comparisons between experimental data and numerical simulations allow validating the numerical model using different types of emitters and polystyrene (PS).

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Efficient evaluation of diffuse view factors for radiation

Cited by 36 publications

References 6 publications

Modélisation par éléments finis du chauffage infrarouge des membranes thermoplastiques semi-transparentes

Modélisation par éléments finis du chauffage infrarouge des membranes thermoplastiques semi-transparentes

Simulation Versus Design: Two Case Studies in Chemical Reaction Kinetics and Radiative Heat Transfer

Modelling of infrared heating of thermoplastic sheet used in thermoforming process

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