Abstract
The purpose of this scientific work is to improve computer simulations of flammable air-gas explosions with HPC systems. Computational Fluid Dynamics (CFD) is increasingly used for obtaining variable values of fluid flow areas, respectively for the manner in which fluids react with limited surfaces. For a separate analysis of liquids and gases is used CFD, and for more realistic results is used the multi-phase method performed by ANSYS Fluent, which improves the calculation scalability and power. For increasing the processing speed for complex analyses, with multiple geometries and fine meshes, ANSYS provides the user HPC (High Performance Computing) tools applicable for structural, thermal, electromagnetic, fluid dynamics and explicit dynamics solvers. HPC configuration is characterized by a good scalability, having the capacity for future extension of cores or processors. For decreasing the computational simulation time for explosions, the proposed solution consists in running complex simulations on the servers of a HPC cluster. In this way is provided the possibility for a parallel or distributed running on one or several calculation systems. Using HPC along ANSYS applications may be activated by GPU acceleration, while other applications are limited to processing using CPUs. INSEMEX develops technical investigations of explosions and fires occurred in the industrial or civilian field, in compliance with Government Decision 1461/2006, based on the verification of scenarios using virtual computational simulations.
Highlights
Explosions in air-methane mixture are specific to mining industry and are the most common
To solve complex linear and nonlinear, static and dynamic analysis problems, the ANSYS application suite can be used with HPC tools. [5]
ANSYS CFX and FLUENT applications are used for the computer simulation of flammable air-gas explosions. [1]
Summary
Explosions in air-methane mixture are specific to mining industry and are the most common. These incidents lead to significant economic losses and a large number of victims. Physical phenomena associated with explosions, such as releases of gas and liquid, heat and mass transfer, body movement, chemical reactions, fluid-structure interactions as well as acoustic waves can be simulated by computer modelling. Evolution of computing technique and emergence of new generation computers, has led to development of methods for studying the combustion mechanism and explosion of gas mixtures, allowing them to be studied in depth through computer modelling and simulation. Since the 1970s a new branch of fluid mechanics, CFD, has been developed, which uses algorithms, numerical methods and calculations to model and solve problems in which fluid flows occur. To solve complex linear and nonlinear, static and dynamic analysis problems, the ANSYS application suite can be used with HPC tools. [5]
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