Methods for Evaluation of Radiation View Factor: A Review

Gupta, Manoj Kumar; Bumtariya, Kuldip J.; Shukla, H.A.; Patel, Pranav; Khan, Ziauddin

doi:10.1016/j.matpr.2017.01.143

Cited by 28 publications

(14 citation statements)

References 6 publications

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“…VF Estimation bounds Required ray casts Simulation time (s) ±10 -01 10 3 3.3×10 -1 ±10 -01 10 4 3.3×10 0 ±10 -02 10 5 3.3×10 1 ±10 -03 10 6 3.3×10 2 ±10 -04 10 7 3.3×10 3…”

Section: ) Simulation Timementioning

confidence: 99%

“…The view factor is a geometrical concept dependent only on the size, shape and orientation of the surfaces and the distance between them. It is often used in the field of heat and mass transfer, optics and rendering [3,4,5]. In view of such definition, all surfaces must be isothermal, opaque, and Lambertian and the media has no effect (scattering, emission and absorption) on the transfer of radiation between surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…Surfaces are instantiated on these terrain-hit points. (2) Y number of rays are cast in all directions from the APV and each ray hit is counted per surface (3).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Fast and accurate ray-casting-based view factor estimation method for complex geometries

Sönmez¹,

Ziar²,

Isabella³

et al. 2019

Solar Energy Materials and Solar Cells

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“…VF Estimation bounds Required ray casts Simulation time (s) ±10 -01 10 3 3.3×10 -1 ±10 -01 10 4 3.3×10 0 ±10 -02 10 5 3.3×10 1 ±10 -03 10 6 3.3×10 2 ±10 -04 10 7 3.3×10 3…”

Section: ) Simulation Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast and accurate ray-casting-based view factor estimation method for complex geometries

Sönmez¹,

Ziar²,

Isabella³

et al. 2019

Solar Energy Materials and Solar Cells

View full text Add to dashboard Cite

“…For each new part geometry, a study of the view factors between the infrared heaters and the part is necessary to establish an initial configuration, position and orientation of the heaters [19,20]. Then, temperature variability must be verified over the corresponding mold (both diaphragms formed) with a thermographic camera.…”

Section: Tune-up Of the Heating Gridmentioning

confidence: 99%

Design of a Prototype for the In Situ Forming of a Liquid-Infused Preform Process

Juan¹,

Salán²,

Silva

et al. 2019

Journal of Mechanical Design

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The world is changing and demanding stronger, lighter, and more versatile materials. Taking advantage of the full potential of these materials also requires versatile manufacturing processes. The in situ forming of a liquid-infused preform (ISFLIP) is a new manufacturing process for fiber-reinforced polymer (FRP) parts with shell shapes. ISFLIP is a hybrid process between vacuum infusion (VI) and diaphragm forming. This paper focuses on the mechanical design and experimental validation of a functional prototype of ISFLIP. The novelty of the design lies especially in a double-diaphragm system that is fundamental to carrying out the forming just after the infusion stage. The double-diaphragm system and other two major subsystems, a vacuum table and an infrared heating grid, were devised to benefit from the operational advantages of ISFLIP. The whole prototype, once constructed, was tested by forming some demonstration components. The result of one of these components, a “C” cross-section FRP profile with two sharp joggles, is finally obtained, proving the feasibility of the prototype.

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“…Computational algorithms specifically addressed towards view factor calculations have existed for over seven decades [3]. Such algorithms employ either analytical or probabilistic techniques, broadly referred to as Radiosity and Monte Carlo methods, respectively [4].…”

Section: Introductionmentioning

confidence: 99%

Calculation of View Factors for Building Simulations with an Open-Source Raytracing Tool

et al. 2022

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Longwave radiative heat transfer is a key determinant of energy consumption in buildings and view factor calculations are therefore required for the detailed simulation of heat transfer between buildings and their environment as well as for heat exchange within rooms. Typically, these calculations are either derived through analytical means or performed as a part of the simulation process. This paper describes the methodology for employing RADIANCE, a command-line open-source raytracing software, for performing view factor calculations. Since it was introduced in the late-1980s, RADIANCE has been almost exclusively employed as the back-end engine for lighting simulations. We discuss the theoretical basis for calculating view factors through Monte Carlo calculations with RADIANCE and propose a corresponding workflow. The results generated through RADIANCE are validated by comparing them with analytical solutions. The fundamental methodology proposed in this paper can be scaled up to calculate view factors for more complex, practical scenarios. Furthermore, the portability, multi-processing functionality and cross-platform compatibility offered by RADIANCE can also be employed in the calculation of view factors.

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Methods for Evaluation of Radiation View Factor: A Review

Cited by 28 publications

References 6 publications

Fast and accurate ray-casting-based view factor estimation method for complex geometries

Fast and accurate ray-casting-based view factor estimation method for complex geometries

Design of a Prototype for the In Situ Forming of a Liquid-Infused Preform Process

Calculation of View Factors for Building Simulations with an Open-Source Raytracing Tool

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