Influence of convective heat transfer modelling in CFD simulations of upward flame spread

نویسندگان

چکیده

Focusing on convective heat transfer modelling upward flame spread scenarios, different methods for calculating the fluxes are explored. These approaches involve: 1) based stagnant film theory; 2) using a simplified approach 3) Nusselt correlations natural convection; and 4) convection effective (i.e., laminar plus sgs) thermal diffusivity. Large eddy simulations (LES) of series Single Burning Item (SBI) experiments with Medium Density Fiberboard (MDF) plywood walls performed. Even though discrepancies observed, which considered sgs effects performs overall better is able to predict both initial growth period decay phase reasonable accuracy deviations in peak HRR approximately 5% 34% MDF tests cases, respectively). The predicted total are, most fairly good agreement up 15% 20% predictions other far less satisfactory. Overall, it demonstrated that accurate can be important scenarios.

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ژورنال

عنوان ژورنال: Fire Safety Journal

سال: 2021

ISSN: ['1873-7226', '0379-7112']

DOI: https://doi.org/10.1016/j.firesaf.2021.103347