Uporaba računalniške dinamike tekočin za simulacijo različnih pretokov v mikroreaktorjih

Kočevar, Domen

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Title:	Uporaba računalniške dinamike tekočin za simulacijo različnih pretokov v mikroreaktorjih
Authors:	ID Kočevar, Domen (Author) ID Nemet, Andreja (Mentor) More about this mentor... ID Bogataj, Miloš (Comentor)
Files:	VS_Kocevar_Domen_2025.pdf (3,45 MB) MD5: C0A6F7EAC30CEFDE91AB4AB05D04DF7C
Language:	Slovenian
Work type:	Bachelor thesis/paper
Typology:	2.11 - Undergraduate Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	Diplomsko delo prikazuje uporabo računalniške dinamike tekočin (CFD) za simulacijo različnih tokovnih režimov v mikroreaktorju z uporabo programske opreme COMSOL Multiphysics. Osredotočamo se na vpliv različnih tokov na obnašanje vode v mikrokanalu z značilnim zavojem, ki je ključni del mnogih mikrofluidnih sistemov. Z uporabo modula Fluid Flow v COMSOL Multiphysics programu smo izvedli več simulacijskih primerov, ki vključujejo počasni tok, laminarni tok, turbulentni tok, turbulentni tok z velikimi vrtinci (LES) in turbulentni tok z ločenimi velikimi vrtinci (DES). Za vsak režim smo definirali fizikalne pogoje, mrežo ter analizirali rezultate hitrosti, tlaka in tokovnic. Prednost programa COMSOL Multiphysics je v njegovi fleksibilnosti pri modeliranju in možnosti povezovanja različnih fizikalnih pojavov. Rezultati kažejo, da CFD omogoča kakovostno napoved obnašanja toka v mikroreaktorjih, še posebej v območjih z intenzivnim mešanjem. Napredni moduli turbulence, kot sta LES in DES, omogočajo natančnejšo analizo vrtinčenja, a so računsko zahtevnejši. Primerjava med režimi razkrije ključne razlike v pretočnih značilnostih in omogoča boljše razumevanje hidrodinamike sistema. Ugotovili smo, da so numerične simulacije računalniške dinamike tekočin v programu COMSOL Multiphysics uporabno orodje pri načrtovanju in optimizaciji mikroreaktorjev. Pristop zahteva poznavanje numeričnih metod in strukture modela, vendar ponuja močno podporo pri analizi kompleksnih mikrofluidnih pojavov.
Keywords:	mikroreaktorji, računalniška dinamika tekočin, COMSOL Multiphysics, simulacija
Place of publishing:	Maribor
Publisher:	[D. Kočevar]
Year of publishing:	2025
PID:	20.500.12556/DKUM-94879
UDC:	004.94:532.517(043.2)
COBISS.SI-ID:	250516739
Publication date in DKUM:	12.09.2025
Views:	225
Downloads:	46
Metadata:
Categories:	KTFMB - FKKT
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Licences

License:	CC BY 4.0, Creative Commons Attribution 4.0 International

Link:	http://creativecommons.org/licenses/by/4.0/
Description:	This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:	28.08.2025

Secondary language

Language:	English
Title:	Application of computational fluid dynamics to simulate different flows in microreactors
Abstract:	The thesis presents the use of Computational Fluid Dynamics (CFD) for simulating various flow regimes in a microreactor using the COMSOL Multiphysics software. The focus was on various flow conditions affecting fluid behaviour in a microchannel with a characteristic bend, a typical feature of many microfluidic systems. Using the Fluid Flow module in COMSOL Multiphysics, we conducted multiple simulation cases, including creeping flow, laminar flow, turbulent flow, Large Eddy Simulation (LES) and Detached Eddy Simulation (DES). For each regime, we defined physical conditions, mesh configurations, and analyzed velocity, pressure and streamline distributions. A major advantage of COMSOL Multiphysics lies in its flexibility and the ability to couple different physical phenomena within a single environment. The results demonstrate that CFD provides a reliable prediction of fluid behavior in microreactors, especially in zones with intense mixing. Advanced turbulence models such as LES and DES enable a more detailed analysis of vortical structures, although they require more computational resources. The comparison between regimes reveals key differences in flow characteristics and supports a deeper understanding of microreactor hydrodynamics. We conclude that numerical simulations with COMSOL Multiphysics are a useful tool for designing and optimizing microreactors. While the software requires basic knowledge of numerical methods and model setup, it offers powerful support for analyzing complex microfluidic phenomena.
Keywords:	microreactors, computational fluid dynamics, COMSOL Multiphysics, simulation

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