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Numerična optimizacija oblike šobe za plinsko fokusiranje : magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
ID Bartolj, Jan (Author), ID Šarler, Božidar (Mentor) More about this mentor... This link opens in a new window, ID Majdič, Franc (Comentor)

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Abstract
Plinsko tokovno fokusiranje je postopek, pri katerem z vzporednim tokom fokusiramo curek kapljevine z obtekajočim plinom. Najpomembnejši element je šoba, ki mora biti oblikovana tako, da je fokusiranje ustrezno glede na zahteve uporabnika. Pri tokovnem fokusiranju ima na hitrost curka fokusirane kapljevine največji vpliv strižna sila, ki se pojavi kot posledica pretoka obtekajočega plina. Uporabili smo gradientno adjungirano numerično optimizacijsko metodo, s katero smo skušali spremeniti obliko šobe tako, da bi povečali strižno silo na curek. Z uporabo metode smo dokazali, da lahko strižno silo na curek povečamo za več kot 100 %.

Language:Slovenian
Keywords:magistrske naloge, tokovno fokusiranje, mikrofluidika, strižna sila, pretok, numerična optimizacija, gradientno adjungirana metoda
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:J. Bartolj
Year:2024
Number of pages:XXIV, 71 str.
PID:20.500.12556/RUL-163209 This link opens in a new window
UDC:621.45.035:621.6.03:66.096.5(043.2)
COBISS.SI-ID:210295811 This link opens in a new window
Publication date in RUL:04.10.2024
Views:108
Downloads:67
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Secondary language

Language:English
Title:Numerical optimization of the shape of flow-focusing nozzle
Abstract:
Gas flow focusing is a process in which a liquid jet is focussed with the aid of a gas flowing in parallel. The most important element is the nozzle, which must be designed in such a way that focusing takes place according to the user's requirements. In stream focussing, the shear force generated by the flow of the flowing gas has the largest influence on the jet velocity of the focused liquid. Using a numerical gradient-adjoint optimisation method, we attempted to change the shape of the nozzle in order to increase the shear force on the stream. Using this method, we have shown that the shear force per jet can be increased by more than 100 %.

Keywords:master thesis, flow focusing, microfluidics, shear force, flow, numerical optimization, gradient adjoint method

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