Title
Hidraulički efekti prirodne konvekcije u realnim paralelopipednim rezervoarima izloženim spoljnim uticajima
Creator
Ayed, Sadoon K.
Copyright date
2016
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 22.12.2016.
Other responsibilities
mentor
Ilić, Gradimir
član komisije
Stevanović, Žarko
član komisije
Jovanović, Miloš
član komisije
Živković, Predrag
član komisije
Vukić, Mića
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Nišu
Faculty
Mašinski fakultet
Group
Katedra za termotehniku, termoenergetiku i procesnu tehniku
Alternative title
Hydraulic effects of natural convection in real rectangular tanks under external influences
Publisher
[S. K. Ayed]
Format
IV, 124 listova
description
Thermal and Chemical Engineering
Abstract (en)
Natural convection in enclosed spaces has been studied for quite a long time in
energetics. It emerges in a wide range from the smallest scales (in pipelines, channels, tanks)
to the largest ones (atmosphere, molten planet core). The occuring processes depend on
geometric relations and temperature of respective surfaces, which defines the type of flow that
would occur. A special group of these flows appears when the flow takes place between two
parallel plates with different temperatures, most often when the lower plate temperature is
higher than that of the upper – a well known case is that of the Rayleigh - Bénard convection.
The given examples of natural convection are still based on the generalization of the
plates confining the flow being unlimited. In engineering practice, this is surely not the case
so that in the proposed research the influence of the side walls to the flow is done, with no
idealization of the process and in the real three-dimensional domain.
Natural convection has an undeniable effect on the thermal-flow processes in
engineering practice. The tanks used in most mobile engineering systems are approximately
of parallelopipedic shape. Such tanks may contain all kinds of hydraulic fluids, so that the
research done within this dissertation has chosen water, diesel fluid, motor oil, alcohol and air
that represent the majority of fluids that can be found in the given tanks. The research done
within the dissertation will show the influence of external effects, most of all, of temperature
changes upon thermal-flow processes taking place in the given tanks. The obtained results
should more closely show the real flow regimes taking place in the given tanks as well as their
influence upon the deposition of solid particles that can be found in the given tanks.
Authors Key words
Rejli-Benarova konvekcija, realni rezervoari, hidraulički fluidi, uzgonsko
strujanje, turbulentni modeli
Authors Key words
Rayleigh - Bénard convection, Real Tanks, Hydraulic Fluids, Buoyancy Flow,
Turbulence Models
Classification
621.644.1:536.22(043.3)
Type
Elektronska teza
Abstract (en)
Natural convection in enclosed spaces has been studied for quite a long time in
energetics. It emerges in a wide range from the smallest scales (in pipelines, channels, tanks)
to the largest ones (atmosphere, molten planet core). The occuring processes depend on
geometric relations and temperature of respective surfaces, which defines the type of flow that
would occur. A special group of these flows appears when the flow takes place between two
parallel plates with different temperatures, most often when the lower plate temperature is
higher than that of the upper – a well known case is that of the Rayleigh - Bénard convection.
The given examples of natural convection are still based on the generalization of the
plates confining the flow being unlimited. In engineering practice, this is surely not the case
so that in the proposed research the influence of the side walls to the flow is done, with no
idealization of the process and in the real three-dimensional domain.
Natural convection has an undeniable effect on the thermal-flow processes in
engineering practice. The tanks used in most mobile engineering systems are approximately
of parallelopipedic shape. Such tanks may contain all kinds of hydraulic fluids, so that the
research done within this dissertation has chosen water, diesel fluid, motor oil, alcohol and air
that represent the majority of fluids that can be found in the given tanks. The research done
within the dissertation will show the influence of external effects, most of all, of temperature
changes upon thermal-flow processes taking place in the given tanks. The obtained results
should more closely show the real flow regimes taking place in the given tanks as well as their
influence upon the deposition of solid particles that can be found in the given tanks.
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