20.500.12556/DKUM-97269 Sklopljen model prenosa toplote in snovi med delcem in tokom tekočine pri razpršilen sušenju na osnovi Metode robnih elementov The Model of Conjugate Heat and Mass Transfer Between a Particle and a Fluid Flow in Spray Drying Based on the Boundary Element Method Sušenje vlažne snovi je ena izmed najstarejših procesnih tehnik, ki se uporablja na številnih industrijskih področjih. Sušenje je zapleten fizikalni proces, ki obsega vezan večfazni prenos toplote, snovi in gibalne količine. Pri sušenju delcev, kot je na primer razpršilno sušenje, je čas sušenja odvisen od lokalnih pogojev v sušilnem plinu, in sicer na poti vsakega posameznega delca skozi sušilnik. Iz tega razloga je zelo pomembno poznavanje temperaturnega polja kot tudi polja vlažnosti v sušilniku, ki se zaradi toplotne in masne izmenjave med delci in sušilnim plinom nenehno spreminja. V prispevku je obravnavan numerični model za izračun sušenja poroznih delcev v toku sušilnega plina, pri čemer je reševanje problema izvedeno v sklopu Euler-Lagrange modela računske dinamike tekočin, in sicer z metodo robnih elementov. Povezava med delci in tokom tekočine je izvedena z nadgradnjo modela točkovnega izvora, ki upošteva konvektivni prenos toplote in snovi v sušilnem plinu. Testni izračuni potrjujejo primernost in pomembnost razvitega numeričnega modela za prostorski in časovni izračun sušenja delcev v toku sušilnega plina. Drying is one of the oldest process technologies, which is used in different industrial applications. Drying process is complex physical process that involves coupled multiphase heat, mass and momentum transfer. As for example by spray drying process, local drying conditions inside the dryer affect to total drying time of porous particles. For this reason, the influence between particle and drying gas is very important. Through the drying process heat and mass exchange between particles and drying gas occurs, which results in local change of drying conditions. Two-way interaction (drying air to particle and particle to drying air) need to be considered to obtain accurate results. Fully coupled model for heat and mass transfer between particles and drying gas on the base of the Boundary Elements Method was developed in the present work, were particles were modelled as points. The results presented in this work show that two-way coupling between particles and drying gas is important in order to provide accurate results. krogelni delci porozni medij metoda robnih elementov eliptična osnovna rešitev razpršilno sušenje 1D model spherical particle porous media boundary element method elliptic fundamental solution spray drying 1D approach true false true Univerza v Mariboru, Univerzitetna založba Slovenski jezik Angleški jezik Znanstveno delo 2026-02-26 07:53:53 2026-02-26 07:53:53 2026-03-30 10:15:23 0000-00-00 00:00:00 2022 0 Maribor 0 36 št.1 Letn.12 apr. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-01-05 0000-00-00 2022-04-30 536:538.9 106546947 10.18690/analipazu.12.1.31-66.2022 2820-364X Sklopljen_model_prenosa-Gomboc-2022.pdf Sklopljen_model_prenosa-Gomboc-2022.pdf 1 8D7A0544E1B4BCA2EA60D373CD81EC3B aa6002a67a2f1131962fa59de75270bd7c156e05fa5a7d523e83fa7f43b74bd0 65e23fd7-12e0-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203890 https://journals.um.si/index.php/anali-pazu/article/view/1897 0 3cdf29ad-12e0-11f1-94ed-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203889 Univerzitetna založba Univerze v Mariboru Fakulteta za strojništvo Anali PAZU 0 0 0