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Collision of convex objects for calculation of porous mesh in gas explosion simulation
Journal of Loss Prevention in the Process Industries ( IF 3.6 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jlp.2020.104347
Tatiele D. Ferreira , Sávio S.V. Vianna

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.



中文翻译:

瓦斯爆炸模拟中用于多孔网格计算的凸物体碰撞

我们研究了基于Minkowski加法的小火焰燃烧模型与碰撞距离算法的耦合。碰撞算法被编码为基于PDR(孔隙分布电阻)方法来计算几何形状的孔隙率,用于复杂几何形状的建模。由流动与多孔物体的相互作用产生的湍流场用于通过脉动速度来计算火焰的起皱长度尺度。湍流会根据单元表面的指定孔隙率进行修改。燃烧和孔隙率模型是在内部Fortran代码的框架中实现的,该代码可解决整个Navier-Stokes方程组。该代码名为STOKES-冲击动力学爆炸模拟器)。给出了针对不同几何形状的非反应流和反应流的结果。将数值结果与标准的商用CFD工具进行比较。

更新日期:2020-12-01
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