کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7845975 1508603 2018 42 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radiation characteristics of water droplets in a fire-inspired environment: A Monte Carlo ray tracing study
ترجمه فارسی عنوان
ویژگی های تابش از قطرات آب در یک محیط الهام گرفته از آتش: یک مطالعه ردیابی صاف مونت کارلو
کلمات کلیدی
تابش آب غبار، پراکندگی ناهمسانگردی، مونت کارلو، روش جدول بندی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
چکیده انگلیسی
The effects of radiation of water mists in a fire-inspired environment are numerically investigated for different complexities of radiative media in a three-dimensional cubic enclosure. A Monte Carlo ray tracing (MCRT) method is employed to solve the radiative transfer equation (RTE). The anisotropic scattering behaviors of water mists are modeled by a combination of the Mie theory and the Henyey-Greestein relation. A tabulation method considering the size and wavelength dependencies is established for water droplets, to reduce the computational cost associated with the evaluation of the nongray spectral properties of water mists. Validation and verification of the coupled MCRT solver are performed using a one-dimensional slab with gray gas in comparison with the analytical solutions. Parametric studies are then performed using a three-dimensional cubic box to examine radiation of two monodispersed and one polydispersed water mist systems. The tabulation method can reduce the computational cost by a factor of one hundred. Results obtained without any scattering model better conform with results obtained from the anisotropic model than the isotropic scattering model, when a highly directional emissive source is applied. For isotropic emissive sources, isotropic and anisotropic scattering models predict comparable results. The addition of different volume fractions of soot shows that soot may have a negative impact on the effectiveness of water mists in absorbing radiation when its volume fraction exceeds certain threshold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 212, June 2018, Pages 97-111
نویسندگان
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