Thermal radiative coefficients of cylindrically and spherically shaped soot particles and soot agglomerates

Nilsson, T.; Sundén, Bengt

doi:10.1007/s00231-004-0519-3

Cited by 4 publications

(5 citation statements)

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“…Due to his experience in analysis and modeling, Professor Sundén has contributed in moving the frontier forward and improved engineering calculation methods. For further details, see references [36][37][38].…”

Section: Professor Sundén Started His Research Career In 1973 Atmentioning

confidence: 99%

Heat Transfer Research in Sweden: Historical and Current Activities

Sundén

2012

Heat Transfer Engineering

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Section: Professor Sundén Started His Research Career In 1973 Atmentioning

confidence: 99%

Heat Transfer Research in Sweden: Historical and Current Activities

Sundén

2012

Heat Transfer Engineering

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“…Furthermore, the phase function becomes highly peaked in the forward direction and the Rayleigh approximation is invalid [121]. The limiting shapes of conglomeration are the sphere and the long cylinder [125] and the extinction coefficient of soot agglomerates lies between those of spherical and cylindrical particles [126].…”

Section: Sootmentioning

confidence: 99%

Radiative properties of materials with surface scattering or volume scattering: A review

Zhu

Lee

Zhang

2009

Front. Energy Power Eng. China

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Radiative properties of rough surfaces, particulate media and porous materials are important in thermal engineering and many other applications. These properties are often needed for calculating heat transfer between surfaces and volume elements in participating media, as well as for accurate radiometric temperature measurements. In this paper, recent research on scattering of thermal radiation by rough surfaces, fibrous insulation, soot, aerogel, biological materials, and polytetrafluoroethylene (PTFE) is reviewed. Both theoretical modeling and experimental investigation are discussed. Rigorous solutions and approximation methods for surface scattering and volume scattering are described. The approach of using measured surface roughness statistics in Monte Carlo simulations to predict radiative properties of rough surfaces is emphasized. The effects of various parameters on the radiative properties of particulate media and porous materials are summarized.

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“…The shape of single soot in combustion systems is very complex. It may be spherical or cylindrical, and usually, the soot may be agglomerate (Nilsson and Sunden, 2004). But for soot cloud, the macroscopic appearance is spherical, so the soot shape is always considered spherical in engineering applications (Solovjov and Webb, 2001), and both the Mie and Rayleigh scattering theories are based on the assumption that the particles are spherical.…”

Section: Mie Scattering Theorymentioning

confidence: 99%

“…The radiation properties of soot are calculated by the Mie theory (with scattering) and Rayleigh theory (without scattering). For the Mie theory, the size of the soot is given in a range between 5 up to 300 nm (Nilsson and Sunden, 2004). In this study, the soot diameter is kept as 30 nm (Viskanta and Menguc, 1987, Numerical analysis of radiative heat Saffaripour et al, 2014) as the input to the Mie theory.…”

Section: Numerical Analysis Of Radiative Heatmentioning

confidence: 99%

Numerical analysis of radiative heat transfer in an inhomogeneous and non-isothermal combustion system considering H₂O/CO₂/CO and soot

Wang

Dong

Zhang

et al. 2017

HFF

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Purpose H2O, CO2 and CO are three main species in combustion systems which have high volume fractions. In addition, soot has strong absorption in the infrared band. Thus, H2O, CO2, CO and soot may take important roles in radiative heat transfer. To provide calculations with high accuracy, all of the participating media should be considered non-gray media. Thus, the purpose of this paper is to study the effect of non-gray participating gases and soot on radiative heat transfer in an inhomogeneous and non-isothermal system. Design/methodology/approach To solve the radiative heat transfer, the fluid flow as well as the pressure, temperature and species distributions were first computed by FLUENT. The radiative properties of the participating media are calculated by the Statistical Narrow Band correlated K-distribution (SNBCK), which is based on the database of EM2C. The calculation of soot properties is based on the Mie scattering theory and Rayleigh theory. The radiative heat transfer is calculated by the discrete ordinate method (DOM). Findings Using SNBCK to calculate the radiative properties and DOM to calculate the radiative heat transfer, the influence of H2O, CO2, CO and soot on radiation heat flux to the wall in combustion system was studied. The results show that the global contribution of CO to the radiation heat flux on the wall in the kerosene furnace was about 2 per cent, but that it can reach up to 15 per cent in a solid fuel gasifier. The global contribution of soot to the radiation heat flux on the wall was 32 per cent. However, the scattering of soot has a tiny influence on radiation heat flux to the wall. Originality/value This is the first time H2O, CO2, CO and the scattering of soot were all considered simultaneously to study the radiation heat flux in combustion systems.

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Thermal radiative coefficients of cylindrically and spherically shaped soot particles and soot agglomerates

Cited by 4 publications

References 20 publications

Heat Transfer Research in Sweden: Historical and Current Activities

Heat Transfer Research in Sweden: Historical and Current Activities

Radiative properties of materials with surface scattering or volume scattering: A review

Numerical analysis of radiative heat transfer in an inhomogeneous and non-isothermal combustion system considering H₂O/CO₂/CO and soot

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Thermal radiative coefficients of cylindrically and spherically shaped soot particles and soot agglomerates

Cited by 4 publications

References 20 publications

Heat Transfer Research in Sweden: Historical and Current Activities

Heat Transfer Research in Sweden: Historical and Current Activities

Radiative properties of materials with surface scattering or volume scattering: A review

Numerical analysis of radiative heat transfer in an inhomogeneous and non-isothermal combustion system considering H2O/CO2/CO and soot

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Numerical analysis of radiative heat transfer in an inhomogeneous and non-isothermal combustion system considering H₂O/CO₂/CO and soot