Načrtovanje mikrofluidne naprave za tok kompleksnih fluidov

Gorše, Luka (author), Plazl, Igor (mentor)

V diplomskem delu so v tretjem poglavju predstavljene osnove kompleksnih fluidov in matematični modeli, ki so pomembni za opis kompleksnih fluidov. V četrtem poglavju sem s pomočjo literature raziskal in opisal področje mikrofluidike, mikrofluidnih naprav ter najpomembnejše transportne pojave v mikrofluidnih sistemih. Predstavljeni so bili tudi materiali za izdelavo mikrofluidnih čipov ter fabrikacija mikrofluidnih naprav. V poglavju pet, sem se posvetil pregledu literature o pasivnih in aktivnih mikromešalnih napravah in njihovi uporabi. V zadnjem poglavju diplomske naloge je bilo glavno področje raziskovanja večfazni tok fluidov. Pri tem sem se osredotočil na pregled literature s področja nastanka nestabilnosti v dvokomponentnem toku v mikrofluidnih napravah. Ugotovljeno je bilo, da eden izmed ključnih dejavnikov za nastanek nestabilnosti v večfaznem toku, predvsem razlika v viskoznosti in gostoti komponent in da je mogoče s spreminjanjem volumenske frakcije fluidov, ter uravnavanjem hitrosti pretokov, nestabilnosti bodisi ojačati ali pa omejiti. Temeljna metoda dela pri izdelavi diplomske naloge je bil pregled literature, tako člankov kot knjig o omenjenih temah.

• Language: Slovenian
• Keywords: kompleksni fluid, mikrofluidika, mikrofluidne naprave, večfazni tok
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2019
• PID: 20.500.12556/RUL-109555
• COBISS.SI-ID: 1538325187
• Publication date in RUL: 05.09.2019

Secondary language

• Language: English
• Title: Designing of microfluidic device for flow of complex fluids

Abstract

In the third chapter of my diploma thesis some basic principles of complex fluids and mathematical models for their modelling are presented. The fourth chapter concentrates on the field of microfluidics, microfluidic devices and transport phenomena in microfluidics. In the chapter I also present different materials and methods for fabrication of microfluidic devices. In the chapter five the main goal was to present passive and active micromixers and their use in microfluidics. The last chapter of my diploma thesis was driven by research on multiphase flow of fluids. I also focused my research on summarizing literature on the formation of instabilities in the multiphase flow, from which I concluded that difference in viscosity and density of two fluids is one of the main reasons for formation of instabilities in a fluid network. From literature review I concluded that instabilities can be either enhanced or weakened by adjusting volume fraction of inlet fluids and flow rate. The main method of my research was literature review from articles, as well as books.

• Keywords: complex fluid, microfluidics, microfluidic devices, multiphase flow