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Analysis and Simulation in Explosion Protection

Working Group 3.51


The Working Group 3.51 investigates processes related to explosion protection in energy technology. This includes the complex interaction of turbulent flows, chemical reactions and structural deformations. To this end we follow the approach to utilize experiments to obtain an in-depth insight in the underlying physical mechanisms. Based on the measurements new numerical modeling strategies are developed. Finally, these models are implemented in highly-resolved fluid mechanical simulations. The aim of our research is to gain a detailed understanding of flows in the field of explosion protection and to facilitate their evaluation through numerical tools.

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The research of the group concerns a wide range of flows in the field of explosion protection.
Examples are the ignition of combustible atmospheres through hot free jets (Fig. 1) or electrical discharges of a low energy and the structural integrity of flameproof enclosures. Moreover, we investigate the fluid dynamics and reaction kinetics in jet stirred reactors (Fig. 2) and the accumulation of electrostatic energy during the pneumatic transport of powders (Fig. 3). To this end we operate experimental facilities which are equipped with state-of-the-art Laser Induced Fluorescence (LIF) and schlieren imaging systems. Concerning theoretical analysis we focus on the development of new models and Computational Fluid Dynamics (CFD) simulations via high performance computing. Hereby the turbulent structures are computed either through Large-Eddy Simulations (LES) or Direct Numerical Simulations (DNS).

Fig. 1: Single-shot (left) LIF image of a hot free jet and the mean and standard deviation (right) of several images.
Fig. 2: Large-eddy simulation of the flow field inside a jet stirred reactor.
Fig. 3: Simulation of charged particles in a turbulent channel flow considering electrostatic forces.

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