Opazovanje interakcije med aktivnimi nukleacijskimi mesti pri vrenju s pomočjo optične pincete

Kavčič, Martin (author), Golobič, Iztok (mentor), Može, Matic (comentor)

V nalogi obravnavamo interakcije med aktivnimi nukleacijskimi mesti pri podhlajenem vrenju dielektričnega fluida FC-72 pri atmosferskem tlaku na razdaljah med nukleacijskimi mesti (30, 60, 90, 120 in 200 µm). Poudarek je na vplivu razdalje med aktivnimi nukleacijskimi mesti ter nastanek koalescence. Pri tem smo uporabili optično pinceto za gretje in ustvarjanje nukleacijskih mest po grelni površini. Ugotovili smo, da razdalja vpliva na interakcije, ter našli intervalno oceno minimalne razdalje med dvema nukleacijskima mestoma, kjer ne nastaneta dva mehurčka.

• Language: Slovenian
• Keywords: mehurčkasto vrenje, optična pinceta, nukleacijsko mesto, koalescenca
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2024
• PID: 20.500.12556/RUL-161145
• Publication date in RUL: 07.09.2024

Secondary language

• Language: English
• Title: Observation of interaction between active nucleation sites during boiling using optical tweezers

Abstract

In this thesis, we examine the interactions between active nucleation sites during subcooled boiling of the dielectric fluid FC-72 at atmospheric pressure, focusing on distances between nucleation sites (30, 60, 90, 120, and 200 μm). The emphasis is on the impact of the distance between active nucleation sites and the formation of coalescence. An optical tweezer was used for heating and creating nucleation sites across the heating surface. We found that the distance influences the interactions and identified an interval estimate for the minimum distance between two nucleation sites where two bubbles do not form.

• Keywords: nucleate boiling, optical tweezer, nucleation site, coalescence