Flow Simulation in a 2D Bubble Column with the Euler-lagrange and Euler-euler Method
Open accessAbstract
Object: Bubbly flows, as present in bubble column reactors, can be simulated using a variety of simulation techniques. It is presented, how Computational Fluid Dynamics (CFD) methods are used to simulate a pseudo 2D bubble column using Euler-Lagrange (EL) and Euler-Euler (EE) techniques. Method: The presented EL method uses the open access software OpenFOAM to solve bubble dynamics with bubble interactions computedviaMonte Carlo methods. The estimated bubble size distribution and the predicted hold-up are compared with experimental data and other simulative EE work with a reasonable consensus for both. Benchmarks with state of the art EE simulations shows that the EL approach shows good performance if the bubble number stays at a certain level, as the EL approach scales linearly with the number of bubbles simulated. Therefore, different computational meshes have been used to account for influence of the resolution quality. Conclusion: The EL approach indicated faster solution for all realistic cases, only deliberate decrease of coalescence rates could push CPU time to the limits. Critical bubble number - when EE becomes superior to the EL approach - was estimated to be 40.000 in this particular case.
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Weber and Bart [243] found that for low-to-moderate values of gas superficial velocity, the results of numerical simulations match well with the experimental results of Diaz et al. [245], while significant deviations are found for high values of gas superficial velocity.
“They found that for low-to moderate values of gas superficial velocity, the results of numerical simulations match well with the experimental results of Diaz et al. [245]. On the contrary, significant deviations are found in case of high values of gas superficial velocity.”
From Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review (2022) · cites this paper as [243]
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Experimental — accuracy not yet measuredWeber and Bart [243] stated that the Euler-Lagrange approach may be advantageous over the Euler-Euler one if the number of bubbles does not exceed 40,000, and recommended using Euler-Euler if the gas hold-up is high (>5%) and if the bubble size is small (<4 mm).
“stating that the Euler-Lagrange approach may be advantageous over the Euler-Euler one if the number of bubbles does not exceed 40,000. Besides, they recommend to use the Euler-Euler if the gas hold-up is high (>5%) and if the bubble size is small (<4 mm).”
From Modeling and Simulation of Photobioreactors with Computational Fluid Dynamics—A Comprehensive Review (2022) · cites this paper as [243]
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- Authors
- Weber, A., & Bart, H.-J.
- Affiliations
- University of Kaiserslautern (DE)
- Corresponding author
- Bart, Hans-Jörg
- ORCID
- Bart, Hans-Jörg
- Venue
- The Open Chemical Engineering Journal
- Publisher
- Bentham Science Publishers Ltd.
- Published
- 2018-01-25
- Volume
- 12
- Issue
- 1
- Pages
- 1-13
- ISSN
- 1874-1231 (ISSN-L)
- OpenAlex
- W2648229383
- Cited by
- 15
- References
- 33
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 1
- FWCI
- 0.50
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- The Open Chemical Engineering Journal (publishedVersion, cc-by)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Technische Universität Kaiserslautern
- Deutsche Forschungsgemeinschaft (RTG GrK 1932)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Fluid Dynamics and Mixing
- Physical Sciences › Environmental Science › Water Science and Technology › Minerals Flotation and Separation Techniques
- Physical Sciences › Engineering › Computational Mechanics › Granular flow and fluidized beds
- Keywords
- bubble column, bubbly flow, Euler-Lagrange method, bubble dynamics, bubble coalescence, bubble size distribution, void fraction, computational cost, grid resolution, OpenFOAM
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