Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 5 2021 07 23 Comparison study of compartment fire simulation with steady laminar flamelet and eddy dissipation model Comparison study of compartment fire simulation with steady laminar flamelet and eddy dissipation model 2953 2966 3920 10.22060/mej.2020.17303.6568 FA Seyed Mohammad Jamal Razeghi Tarbiat Modares University Mohamad Safarzadeh Tarbiat Modares University Hadi PasdarShahri Assistant Professor, Faculty of Mechanical Engineering, Tarbiat Modares University Journal Article 2019 11 01 The present study is conducted to find a compatible combustion model, in case of single room compartment fire. The large eddy simulation was used with one-equation sub-grid scale turbulence model by steady laminar flamelet and eddy dissipation models were acquired as the combustion model. OpenFOAM solver based on C++ programming language was developed to use the flamelet model. The benefit of the flamelet model employment than the eddy dissipation model was regarding the lower computational cost which was about 14 percent lower in this case. Moreover, steady laminar flamelet model considered the detailed chemical kinetic of GRI 3.0, however, eddy dissipation model treated the chemical kinetics of the model with an irreversible single-step Arrhenius global reaction which is only able to estimate the main products of combustion. Deviations of velocity and temperature at the doorway showed that the steady laminar flamelet model predictions were accurate with an uncertainty error of 3.3 % for temperature and 8 % for velocity, respectively. Prediction of the temperature inside the room with a steady laminar flamelet model was estimated to have 3.2 % accuracy. The present study is conducted to find a compatible combustion model, in case of single room compartment fire. The large eddy simulation was used with one-equation sub-grid scale turbulence model by steady laminar flamelet and eddy dissipation models were acquired as the combustion model. OpenFOAM solver based on C++ programming language was developed to use the flamelet model. The benefit of the flamelet model employment than the eddy dissipation model was regarding the lower computational cost which was about 14 percent lower in this case. Moreover, steady laminar flamelet model considered the detailed chemical kinetic of GRI 3.0, however, eddy dissipation model treated the chemical kinetics of the model with an irreversible single-step Arrhenius global reaction which is only able to estimate the main products of combustion. Deviations of velocity and temperature at the doorway showed that the steady laminar flamelet model predictions were accurate with an uncertainty error of 3.3 % for temperature and 8 % for velocity, respectively. Prediction of the temperature inside the room with a steady laminar flamelet model was estimated to have 3.2 % accuracy. https://mej.aut.ac.ir/article_3920_d6525aa8638c1d8d4da535fbb1a5fc80.pdf