Browsing Institutt for energi og prosessteknikk by Title
Now showing items 2729-2748 of 4147
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Numerical simulation of a separating gas-liquid flow regime in a balance piston
(Master thesis, 2020)Ved hjelp av CFD undersøker denne oppgaven et separerende gas-væske strømningsregime, tidligere oppdaget av OneSubsea. Strømningsregimet ble oppdaget av OneSubsea i en annulær tetning, som en del av en flerfasepumpe, nærmere ... -
Numerical simulation of air injection in Francis turbines
(Master thesis, 2017)With the increasing use of renewable energy such as wind and solar, the power market operation is changing. The energy producers using classic resources have to adapt. This applies to hydropower plants as well, which are ... -
Numerical simulation of an integrated CO2 heat pump/chiller and thermal storage system for a hotel in tropical weather conditions
(Master thesis, 2022)Oppgaven undersøker numerisk ytelsen til en CO2 varmepumpe kjøleenhet integrert med en ejektor for å dekke behovet for kjøling og varmtvann (DHW) til et hotell i India. Systemet er komplett med fem lagdelte lagringstanker ... -
Numerical simulation of cavitation on a reversible pump turbine with pre-rotation
(Master thesis, 2020)For å redusere effekten av klimaendringene, må CO2 utslippene reduseres betraktelig. En løsning er å øke kapasiteten av fornybare energikilder. Pumpekraftverk er i dag en av de vanligste metodene for å stabilisere strømnettet ... -
Numerical simulation of circulation in boundary layers over sinusoidally modulated walls
(Master thesis, 2020)Skjærstrømninger over sinusoidalt modulerte vegger har vist å produsere roterende strømninger i et fluid i form av sirkulerende cellepar med motsatt roterende retning. Cellenes roterende akse er parallell med strømningsretningen ... -
Numerical Simulation of Fluid- Structure Interaction
(Master thesis, 2021)I denne masteroppgaven blir en høyere ordens ghost point immersed boundary metode (GPIBM) designet for kompressibel strømning og fluid-strukturinteraksjon (fluid-structure in- teraction, FSI) applikasjoner redusert til ... -
Numerical simulation of Fluid-Structure Interaction in high head Francis turbines
(Doctoral theses at NTNU;2019:229, Doctoral thesis, 2019)Renewable energy sources are becoming an integral part of the global energy mix. As hydropower can be used to stabilize the new energy market, this calls for increased demands from Francis turbines. Accurate calculation ... -
Numerical Simulation of Multiphase Pipelines
(Master thesis, 2007)The multiphase flow simulators OLGA 5 and LEDA version 1.05 are tested against experimental data and field data. Experimental data on gas-condensate flow in a high pressure flow loop (inclined pipe project), and on air-water ... -
Numerical Simulation of slug flow in a micro-channel
(Master thesis, 2007)Multiphase dynamics and characteristics of slug flow in micro channels are investigated computationally by means of advanced numerical simulation methods. Although, due to its importance in many engineering and biomedical ... -
Numerical Simulation of Solidifying Flow - Numerisk simuleringing av størking
(Master thesis, 2018)This thesis consists of deriving and testing a numerical model for convection dominated solid-liquid phase transitions. Two scientific articles represents the main body of the thesis, but a short documentation of the work ... -
Numerical simulation of surge wave instability of long distance transport of multiphase flow
(Master thesis, 2018)The surge wave is an unstable flow phenomenon that may occur in the wet gas pipelines. The dramatic decrease in gas flow rate or the stopping of gas production due to other reasons would cause the liquid accumulation at ... -
Numerical simulation of the airborne transmission of COVID-19 due to respiratory activities under different ventilation conditions.
(Master thesis, 2022)Covid-19 pandemic have recently raised lots of issues about the way we lived socially and have led to various studies for our social behaviour to be adapted to struggle the crisis. This report presents the work done during ... -
Numerical simulation of thermal environment at different relative humidity levels in one operating room of St. Olav’s hospital
(Journal article, 2021)This study investigated the influence of three different levels of relative humidity, 20%, 40%, and 60% on the thermal comfort of surgical patient and staff in one operating room of St. Olav’s hospital with mixing ventilation. ... -
Numerical simulation of transient behavior of wood log decomposition and combustion
(Doctoral theses at NTNU;2018:280, Doctoral thesis, 2018)Heat from wood combustion in domestic wood stoves is a main contributor to the bioenergy in Norway. However, wood combustion in such small-scale combustion appliances can cause significant emissions, e.g. fine particulate ... -
Numerical simulations andexperimental studies for nasaldelivery of vaccines and drugs
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:64, Doctoral thesis, 2012) -
Numerical simulations of combustion near solid and hydrogen permeable walls
(Doctoral theses at NTNU;2021:306, Doctoral thesis, 2021)The goal of the present thesis was to investigate a selective and isothermal, chemically inert hydrogen-permeable or porous wall boundary condition to laminar flame simulations to understand the flow physics of near-wall ... -
Numerical simulations of fluid flow and particle deposition in a cascade impactor
(Master thesis, 2022)Iceland Deep Drilling Project (IDDP) er et prosjekt som sikter seg inn på å forbedre prosessen og øke potensialet til geotermisk energi ved hjelp av varmeutvinning av fluider langt nede i jordskorpen. Disse fluidene har ... -
Numerical Simulations of Shell-Side Two-Phase Flow in Spiral-Wound Heat Exchanger - for Natural Gas Liquefaction
(Master thesis, 2015)Heat transfer coefficients and pressure drop of evaporating heat exchangers such as the spiral wound heat exchanger depend on the distribution of the refrigerant fluid. However little open research is available in the study ... -
Numerical simulations of staged biomass grate fired combustion with an emphasis on NOx emissions
(Peer reviewed; Journal article, 2015)In the present paper NOx emissions from biomass combustion was studied, with the objective to demonstrate the applicability of stationary computational fluid dynamics simulations, including a detailed representation of the ... -
Numerical solution of cahn-hilliard system by adaptive least-squares spectral element method
(Journal article, 2018)There is a growing interest in the phase-field approach to numerically handle the interface dynamics in multiphase flow phenomena because of its accuracy. The numerical solution of phase-field models has difficulties in ...