Combustion modeling in large scale volumes using EUROPLEXUS code

Abstract

Numerical benchmarks on the subjects of combustion in large scale volumes and hydrogen safety, which were performed earlier have demonstrated, that current numerical algorithms and physical models experience poor predictive capabilities at the industrial scale, both due to under-resolution and simplifying approaches to combustion modeling. This article describes a validation of the EUROPLEXUS code against several large scale experimental data sets in order to improve its hydrogen combustion modeling capabilities in industrial settings (e.g. reactor buildings). The code employs an algorithm for the propagation of reactive interfaces, RDEM, which includes a combustion wave, as an integrable part of the Reactive Riemann problem, propagating with a fundamental ame speed (being a function of initial mixture properties as well as gas dynamics parameters). This approach makes unnecessary the application of a binary criterion function, which was used in order to determine ame position in Forest-Fire-type methods.

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