20.500.12556/RUL-177383 Analysis of gas flow distribution in a fluidized bed using two-fluid model with kinetic theory of granular flow and coupled CFD-DEM: a numerical study Fluidized bed systems are widely used in chemical and process engineering due to their excellent heat and mass transfer properties. Numerical modeling plays a crucial role in understanding and optimizing these systems, with the two-fluid model enhanced by the kinetic theory of granular flow (TFM-KTGF) and the coupled computational fluid dynamics-discrete element method (CFD-DEM) emerging as leading techniques. This study employs both models to simulate gas-solid interactions and evaluates their performance using a benchmark single-spout fluidized bed case validated against experimental data. Subsequently, the influence of particle presence on gas flow distribution through a non-uniform distribution plate is analyzed. The results show that the common assumption of proportional flow distribution based on the opening area fraction is inaccurate, particularly in the presence of particles. Both numerical models capture this behavior, with TFM-KTGF showing trends comparable to the coupled CFD-DEM approach but at significantly reduced computational cost. The findings highlight the importance of accounting for particle dynamics in distribution plate design and promote the TFM-KTGF approach as a promising alternative for large-scale simulations. Sistemi z lebdečim slojem se pogosto uporabljajo v kemičnem in procesnem inženirstvu zaradi svojih odličnih sposobnosti prenosa toplote in snovi. Numerično modeliranje ima ključno vlogo pri razumevanju in optimizaciji teh sistemov, pri čemer se med vodilne uveljavljata model dveh tekočin, dopolnjen s kinetično teorijo granularnega toka (TFM-KTGF) in sklopljena računalniške dinamike tekočin z metodo diskretnih elementov (CFD-DEM). V tej študiji sta uporabljena oba modela za simulacijo interakcij med plinom in trdnimi delci ter ovrednotena njuna učinkovitost na primeru eksperimentalnega primera iz literature. Analiziran je bil tudi vpliv delcev na porazdelitev toka  plina skozi ne-uniformno distribucijsko ploščo. Rezultati kažejo, da je pogosta predpostavka o sorazmerni porazdelitvi toka glede na delež odprtin nepravilna, zlasti v prisotnosti delcev. Oba numerična modela zajameta to vedenje, pri čemer TFM-KTGF kaže trende primerljive s sklopljenim CFD-DEM pristopom a pri bistveno nižjih računskih časih. Ugotovitve poudarjajo pomen upoštevanja dinamike delcev pri oblikovanju distribucijskih plošč ter promovirajo uporabo TFM-KTGF kot obetavno alternativo za simulacije na velikih sistemih. fluidized bed distribution plate two-fluid model with kinetic theory of granular flow coupled CFD-DEM flow distribution lebdeči sloj distribucijska plošča model dveh tekočin s kinetično teorijo granularnega toka sklopljen CFD-DEM distribucija toka true false true Angleški jezik Slovenski jezik Članek v reviji 2025-12-22 12:08:53 2025-12-22 12:09:00 2025-12-30 04:02:20 0000-00-00 00:00:00 2025 0 0 8 str. no. 9/10 Vol. 71 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.6:004.94 2536-3948 10.5545/sv-jme.2025.1365 260403459 RAZ_Zaloznik_Matija_2025.pdf RAZ_Zaloznik_Matija_2025.pdf 1 464C82C4F5AAEDF61F98ED91194B8EA0 9979cc77ceac8ce9196711ce3d310da4c6f711b211eabd43359d5f94d293ddcc 5c9b1b71-df26-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224401 https://www.sv-jme.eu/sl/article/analysis-of-gas-flow-distribution-in-a-fluidized-bed-using-two-fluid-model-with-kinetic-theory-of-granular-flow-and-coupled-cfd-dem-a-numerical-study/ 1 2fb00d8a-df26-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224400 https://dk.um.si/IzpisGradiva.php?id=96191 1 2dd7487b-df26-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224399 Fakulteta za strojništvo Strojniški vestnik 0 0 0