Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 4057-4076 av 4152
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Viscosity-induced crossing of the phantom divide in the dark cosmic fluid
(Journal article; Peer reviewed, 2013-12-10)Choosing various natural forms for the equation-of-state parameter w and the bulk viscosity ζ, we discuss how it is possible for a dark energy fluid to slide from the quintessence region across the divide w = −1 into the ... -
Viscous Cosmology for Early- and Late-Time Universe
(Journal article; Peer reviewed, 2017)From a hydrodynamicist’s point of view the inclusion of viscosity concepts in the macroscopic theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an abstraction (exluding special cases such ... -
Viscous coupled fluids in terms of a log-corrected equation-of-state
(Peer reviewed; Journal article, 2021)In this paper, we consider a class of cosmological fluids that possess properties analogous to those of crystalline solids undergoing isotropic deformations. Our research is based on a modified log-corrected power-law ... -
Visualisation of zero-emission neighbourhood for architects and the application to Nidarvoll Skole in Trondheim
(Master thesis, 2019)Building, transportation, and human activities are main sources to generate greenhouse gas (GHG) emissions in neighbourhood. In order to reduce GHG emissions in neighbourhoods, architects plays an important role particularly ... -
Visualization of condensation over micro-structured surfaces
(Master thesis, 2016)Water condensation is an ubiquitous phenomenon that happens widely in nature. It is also used in industrial applications such as water harvesting, desalination systems, thermal management and power generation. Filmwise ... -
Volatile Organic Components Adsorption on Activated Carbon
(Master thesis, 2022)Some volatile organic components may cause serious human health and environmental threats. These components are "global warming agents" that contribute to climate change. While the negative impact of methane and carbon ... -
Vortex dislocation mechanisms in the near wake of a step cylinder
(Peer reviewed; Journal article, 2020)Vortex interactions behind step cylinders with diameter ratio D/d = 2 and 2.4 at Reynolds number ( ReD ) 150 were investigated by directly solving the three-dimensional Navier–Stokes equations. In accordance with previous ... -
Vortex dynamics of a jet at the pressure node in a standing wave
(Journal article; Peer reviewed, 2020)In this paper we investigate the vortex structure and dynamics formed in the near field of a turbulent axisymmetric jet subjected to transverse acoustic forcing. Full three-dimensional phase-averaged velocity measurements ... -
Vortex generator's effect on trailing edge vortex shedding and fluid structure interaction
(Peer reviewed; Journal article, 2020)An initial study of the effects vortex generators (VGs) have on the mitigation of vortex-induced vibrations (VIVs) of hydrofoils have been performed at the Waterpower laboratory of the Norwegian University of Science and ... -
Vortex generator's effect on trailing edge wake and fluid structure interaction
(Master thesis, 2020)Detaljer rundt bruk av virvelgeneratorer i hydrodynamiske miljøer og deres effekter på mildning av virvelinduserte vibrasjoner er ennå ikke tilstrekkelig undersøkt i litteraturen. Vannkraftverk som er utsatt for disse ... -
Vortex interaction in the wake of a two- and three-bladed wind turbine
(Peer reviewed; Journal article, 2020)The vortex interaction in the wake behind a two- and three-bladed model scale wind turbine is investigated. The two rotors have equal solidity, and produce similar power and thrust at the design tip speed ratio. Phase-averaged ... -
Vortex system around a step cylinder in a turbulent flow field
(Peer reviewed; Journal article, 2021)The vortex system around the step surface of a step cylinder with a diameter ratio D/d=2 at Reynolds number (ReD) 3900 was investigated by directly solving the three-dimensional Navier–Stokes equations. Formation mechanisms ... -
Vurdering av beregningsmetoder for vind-karakteristika
(Master thesis, 2016)Atmospheric stability is important to, among other things, obtain a more accurate estimate of the wind speed profile. This work presents atmospheric stability distributions at two sites from three masts and compares them. ... -
Vurdering av energibruk og inneklima i verneverdige skolebygninger som renoveres
(Master thesis, 2010)Ny Krohnborg skole er vurdert som verneverdig av byantikvaren i Bergen. Skolen har i de siste årene hatt behov for rehabilitering. Rehabilitering av verneverdige bygninger gir spesielle krav til hvilke tiltak som kan ... -
Vurdering av energiomlegging og energieffektiviserende tiltak i enebolig
(Bachelor thesis, 2023)Det økende behovet for elektrisk energi i samfunnet, samt overgang til fornybare energikilder, har blant annet satt økt fokus på effektiv energibruk. Norges tilknytning til energisituasjonen i Europa via utenlandskablene, ... -
Vurdering av grovpartikkelutskiller ved Elkem Thamshavn
(Master thesis, 2013)Ved Elkem Thamshavn, filter sør, blir partikler separert fra støvholdig gas gjennom to separasjonstrinn. I det først trinnet blir gassen sendt gjennom en radiklon. Denne består av en forutskiller og en syklon. Funksjonen ... -
Vurdering av operasjonell tilgjengelighet av prosessanlegg for CO2-fangst
(Master thesis, 2009)Denne oppgaven viser en metodikk for beregning av operasjonell tilgjengelighet av et aminanlegg for separasjon av CO2 fra eksosgass. Det fins foreløpig ikke anlegg som separerer CO2 fra eksosgass i en storskala sammenheng ... -
Vurdering av utnyttelse av CO2-varmepumpeteknologi i nytt meieri
(Master thesis, 2009)Det analyseres i denne rapporten muligheten for storskala utnyttelse av CO₂ varmepumpeteknologi i et planlagt meieri. Dette innehar et stort simultant behov for både kjøling og oppvarming, noe som legger godt til rette for ... -
Wake behind a concave curved cylinder
(Journal article; Peer reviewed, 2018)The wake behind a quarter-of-ring concave curved cylinder is investigated in this paper by means of direct numerical simulations. The plane of curvature is aligned with the uniform incoming flow. We have appended straight ... -
Wake behind a horizontal-axis wind turbine
(Master thesis, 2011)In this paper theory on cylinder and wind turbine wakes have been studied, and experimental work on the wake behind a wind turbine have been carried out in the Fluids engineering laboratory at NTNU.The objective of this ...