2017/06/19 by Andreas Weber, Andreas Weber⋆, Weber, Andreas +3
Engineering · Environmental Science · Mathematics · Physics and Astronomy · #Bubble #Coalescence (physics) #Computational fluid dynamics #Computer science #Euler's formula #FOS: Physical sciences #Flow (mathematics) #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Mixing #Geometry #Innovative Microfluidic and Catalytic Techniques Innovation #Mathematical analysis #Mathematics #Mechanics #Metallurgical Processes and Thermodynamics #Minerals Flotation and Separation Techniques #Monte Carlo method #Physics #Polygon mesh #Simulation #Statistical physics #Thermodynamics #Work (physics) #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.1706.05836
published in arXiv (Cornell University) (Cornell University) · 14 pages, 4 figures, To be submitted to The Open Chemical Engineering Journal
arxiv created 2017/06/19 · openalex publication_date 2017/06/19 · arxiv updated 2017/06/20 · openalex created_date 2022/10/02 · openalex updated_date 2026/08/05
Bubbly flows, as present in bubble column reactors, can be simulated using a\nvariety of simulation techniques. In order to gain high resolution CFD methods\nare used to simulate a pseudo 2D bubble column using EL and EE techniques. The\nforces on bubble dynamics are solved within open access software OpenFOAM with\nbubble interactions computed via Monte Carlo methods. The estimated bubble size\ndistribution and the predicted hold-up are compared to experimental data and\nother simulative work using EE approach and show reasonable consensus for both.\nBenchmarks with state of the art EE simulations shows that the EL approach is\nadvantageous if the bubble number stays at a certain level, as the EL approach\nscales linearly with the number of bubbles simulated. Therefore, different\ncomputational meshes have been used to also account for influence of the\nresolution quality. The EL approach indicated faster solution for all realistic\ncases, only deliberate decrease of coalescence rates could push CPU time to the\nlimits. Critical bubble number - when EE becomes advantageous over the EL\napproach - was estimated to be 40.000 in this particular case.\n