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Original scientific paper

A CFD-based Approach to Predict Explosion Overpressure: A Comparison to Current Methods

C. Díaz-Ovalle orcid id ; Tecnológico Nacional de México, Instituto Tecnológico de Roque, Departamento de Ingenierías, Km 8 carretera Celaya-Juventino Rosas, Celaya, 38110, Gto., MEXICO
A. López-Molina ; Universidad Juárez Autónoma de Tabasco, División Académica Multidisciplinaria de Jalpa de Méndez, Ingeniería en Petroquímica, carretera Estatal Libre Villahermosa-Comalcalco Km. 27 s/n Ranchería Rivera Alta, Jalpa de Méndez, 86205, Tab., MEXICO
R. Vázquez-Román ; Tecnológico Nacional de México, Instituto Tecnológico de Celaya, Departamento de Ingeniería Química, Av. Tecnológico y A.G. Cubas s/n, Celaya 38010, Gto., MEXICO

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A CFD-based approach has been developed in this work to predict the overpressure produced during an explosion. An adiabatic exothermal reaction allows computing the explosion energy release. To validate the proposed CFD approach, overpressure predictions based on this methodology are compared with results produced with the TNObased method. It is demonstrated that the physics adopted in our model produces satisfactory predictions in the open area. The CFD simulations were carried out in the ANSYS CFX tool. The source of energy corresponds to the one produced by a stoichiometric
proportion in reactants without energy generation. The explosion analysis considered that explosion occurs geometrically as a sequence of control volumes. Thus, the explosion in a volume is assumed to occur when the maximum pressure is achieved in the previous control volume. This way, the explosion is propagated and it is shown that it is equivalent to conventional predicting methods.


CFD; explosion; overpressure; TNO method

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