magistrsko delo
Tilen Tibaut (Author), Jure Ravnik (Mentor)

Abstract

V magistrski nalogi je predstavljena simulacija toka nanotekočine v ogrevani okrogli cevi. Simulacijo smo izvedli s programom ANSYS CFX. Programu smo dodali dodatno parcialno diferencialno enačbo, v kateri so upoštevane lokalne spremembe masnega deleža zaradi Brownovega gibanja in termodifuzije. Predstavljeni so rezultati simulacije za različne obratovalne režime (masni pretok, moč gretja, povprečni masni delež nanodelcev). Rezultate smo primerjali tudi za različne vstopne profile masnega deleža nanodelcev, pri čemer smo upoštevali vpliv sedimentacije delcev. Glede na prikazane rezultate smo ugotovili, da sedimentacija vpliva na intenzivnost naravne konvekcije, kar neposredno vpliva na temperaturo ogrevane cevi.

Keywords

nanotekočine;nanodelci;računalniška dinamika tekočin;večfazni tok;prenos toplote;Brownovo gibanje;termodifuzija;sedimentacija;ANSYS CFX;naravna konvekcija;prisilna konvekcija;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [T. Tibaut]
UDC: 519.876.5:532.5(043.2)
COBISS: 22187030 Link will open in a new window
Views: 821
Downloads: 168
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Other data

Secondary language: English
Secondary title: Development of a numerical model for heat transfer flow simulation in nanofluids
Secondary abstract: In this master thesis we simulated flow of nanofluids in heated circular pipe. The simulations were carried in ANSYS CFX, where we also added an additional a partial differential equation to account for local mass fraction fluctuation from Brownian motion and thermodiffusion. Presented are results of the simulation for different working regimes (mass flux, heat power, average mass fraction of nanoparticles). We also compared results for different inlet profiles for mass fraction of nanoparticles, with which we accounted sedimentation of particles. According to presented results we have found out, that sedimentation considerably effects the intensity of natural convection, which indirectly affects wall temperature of the heated pipe.
Secondary keywords: nanofluids;nanoparticles;fluid dynamics;multiphase flow;heat transfer;Brownian motion;thermodiffusion;sedimentation;natural convection;forced convection;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Energetsko, procesno in okoljsko strojništvo
Pages: XI, 94 f.
ID: 10949095