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Title:Razvoj numeričnega modela za simulacijo toka in prenosa toplote v nanotekočinah
Authors:ID Tibaut, Tilen (Author)
ID Ravnik, Jure (Mentor) More about this mentor... New window
Files:.pdf MAG_Tibaut_Tilen_2018.pdf (9,92 MB)
MD5: 80EA2EC5C48761D316DBCC41B4ECE040
PID: 20.500.12556/dkum/7bb04925-4dac-435e-927e-73a250015289
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
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:nanotekočina, nanodelci, računalniška dinamika tekočin, večfazni tok, prenos toplote, Brownovo gibanje, termodifuzija, sedimentacija, ANSYS CFX, naravna konvekcija, prisilna konvekcija
Place of publishing:Maribor
Publisher:[T. Tibaut]
Year of publishing:2018
PID:20.500.12556/DKUM-71129 New window
UDC:519.876.5:532.5(043.2)
COBISS.SI-ID:22187030 New window
NUK URN:URN:SI:UM:DK:T8RSE86C
Publication date in DKUM:30.08.2018
Views:1672
Downloads:289
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:18.07.2018

Secondary language

Language:English
Title:Development of a numerical model for heat transfer flow simulation in nanofluids
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.
Keywords:nanofluid, nanoparticle, fluid dynamics, multiphase flow, heat transfer, Brownian motion, thermodiffusion, sedimentation, ANSYS CFX, natural convection, forced convection


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