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Original title:
Direct numerical simulation of contact dynamics in pseudo-2D fluidized beds: effects of sampling depth and region size
Authors: Studeník, Ondřej ; Terpáková, Jarmila ; Haidl, Jan ; Isoz, Martin
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2026, Praha (CZ), 20260218
Year: 2026
Language: eng
Abstract: Fluidized-bed configurations are widely employed in industrial processes such as drying, granulation, and heterogeneous chemical reactions due to their efficient mixing and enhanced heat transfer. However, the description of such complex systems is predominantly based on empirical correlations derived from experimental data, which remain challenging to apply to non-standard conditions, such as systems with non-spherical particles or small and atypical geometries. An alternative approach is particle-resolved direct numerical simulation, employing computational fluid dynamics (CFD) coupled with the discrete element method (DEM) via the immersed boundary method (IBM). This high-fidelity approach enables detailed characterization of fluidized bed properties, including collision frequencies and three-dimensional granular temperature. In this contribution, we present the simulation results for a pseudo-2D fluidized bed, which also benefits from well-documented experimental data. Furthermore, we investigate the effects of sampling region size and depth on the evaluated properties, demonstrating a systematic approach for quantitative comparison between numerical simulations and experimental results.
Keywords: CFD-DEM; fluidized beds; granular temperature; immersed boundary method; PR-DNS
Project no.: EH23_020/0008501, GA25-17815S (CEP)
Funding provider: GA MŠk, GA ČR
Host item entry: Topical Problems of Fluid Mechanics 2026, ISBN 978-80-87012-92-5, ISSN 2336-5781
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: https://tpfm.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2026/30-TPFM2026.pdf
Original record: https://hdl.handle.net/11104/0380450
Permalink: http://www.nusl.cz/ntk/nusl-781085
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Authors: Studeník, Ondřej ; Terpáková, Jarmila ; Haidl, Jan ; Isoz, Martin
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2026, Praha (CZ), 20260218
Year: 2026
Language: eng
Abstract: Fluidized-bed configurations are widely employed in industrial processes such as drying, granulation, and heterogeneous chemical reactions due to their efficient mixing and enhanced heat transfer. However, the description of such complex systems is predominantly based on empirical correlations derived from experimental data, which remain challenging to apply to non-standard conditions, such as systems with non-spherical particles or small and atypical geometries. An alternative approach is particle-resolved direct numerical simulation, employing computational fluid dynamics (CFD) coupled with the discrete element method (DEM) via the immersed boundary method (IBM). This high-fidelity approach enables detailed characterization of fluidized bed properties, including collision frequencies and three-dimensional granular temperature. In this contribution, we present the simulation results for a pseudo-2D fluidized bed, which also benefits from well-documented experimental data. Furthermore, we investigate the effects of sampling region size and depth on the evaluated properties, demonstrating a systematic approach for quantitative comparison between numerical simulations and experimental results.
Keywords: CFD-DEM; fluidized beds; granular temperature; immersed boundary method; PR-DNS
Project no.: EH23_020/0008501, GA25-17815S (CEP)
Funding provider: GA MŠk, GA ČR
Host item entry: Topical Problems of Fluid Mechanics 2026, ISBN 978-80-87012-92-5, ISSN 2336-5781
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: https://tpfm.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2026/30-TPFM2026.pdf
Original record: https://hdl.handle.net/11104/0380450
Permalink: http://www.nusl.cz/ntk/nusl-781085
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Record created 2026-08-15, last modified 2026-08-15