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Collision of convex objects for calculation of porous mesh in gas explosion simulation |
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| Institution: | 1. Air Force Institute of Technology, Nigerian Air Force, Nigeria;2. Energy Research Institute University of Leeds, Leeds, United Kingdom;1. Department of Fire Protection Engineering, China People''s Police University, Langfang, Hebei, 065000, PR China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, PR China;3. Process Safety and Disaster Prevention Laboratory, Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, 123, University Rd., Sec. 3, Douliou, Yunlin, Taiwan, 64002, Taiwan;4. Division 2.1 ‘‘Explosion Protection Gases and Dusts’’, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, D-12205, Berlin, Germany |
| Abstract: | We investigate the coupling of the flamelet combustion model with the collision distance algorithm based on Minkowski addition. The collision algorithm is coded to calculate the porosity of the geometry based on the PDR (Porosity Distributed Resistance) approach for modelling of complex geometries. The turbulent field generated by the interaction of the flow with the porous objects is used to calculate the wrinkling length scale of the flame via the fluctuating velocities. The turbulent fluxes are amended in accordance with assigned porosities at the cell faces. The combustion and porosity models are implemented in the framework of an in house Fortran code that solves the full set of Navier-Stokes equations. The code was named STOKES - Shock Towards Kinetic Explosion Simulator). Results are presented for non-reacting flows and reacting flows over different geometries. Numerical findings are compared with standard commercial CFD tools. |
| Keywords: | Collision algorithm CFD Vapour cloud explosion |
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