Browsing NTNU Open by Author "Log, Alexandra Metallinou"
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Assessment of a Parachor Model for the Surface Tension of Binary Mixtures
Log, Alexandra Metallinou; Diky, Vladimir; Huber, Marcia (Peer reviewed; Journal article, 2023)We compiled an experimental database for the surface tension of binary mixtures containing a wide variety of fluids, from the chemical classes (water, alcohols, amines, ketones, linear and branched alkanes, naphthenes, ... -
Depressurization of CO2 in pipes: Analysis of experiments and non-equilibrium flashing flow models
Log, Alexandra Metallinou (Doctoral theses at NTNU;2023:427, Doctoral thesis, 2023)CO2 capture and storage is expected to play a vital role in reaching net zero emissions by 2050. In this context, large-scale CO2 pipeline transportation networks must be deployed. In order to perform safety analyses and ... -
Depressurization of in a pipe: Effect of initial state on non-equilibrium two-phase flow
Log, Alexandra Metallinou; Hammer, Morten; Deng, Han; Austegard, Anders; Hafner, Armin; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2023)It is key in several industrial applications to accurately describe rapid depressurization of liquid and dense phase states. Examples include refrigeration systems, nuclear reactor cooling and capture and storage (CCS). ... -
Development and investigation of HLLC-type finite-volume methods for one and two-phase flow in pipes with varying cross-sectional area.
Log, Alexandra Metallinou (Master thesis, 2020)I dette arbeidet er den numeriske løseren Harten-Lax van Leer Contact (HLLC) utvidet for å anvendes på strømning i rør med varierende tverrsnitt. I tillegg blir den homogene likevekts-tofasemodellen (HEM) løst av HLLC for ... -
Experiments and modelling of choked flow of CO2 in orifices and nozzles
Hammer, Morten; Deng, Han; Austegard, Anders; Log, Alexandra Metallinou; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2022)In order to accelerate the deployment of capture and storage (CCS), engineers need experimentally validated models, among other things, to predict the mass flow rate in process equipment and flow restrictions like valves, ... -
A flashing flow model for the rapid depressurization of CO2 in a pipe accounting for bubble nucleation and growth
Log, Alexandra Metallinou; Hammer, Morten; Munkejord, Svend Tollak (Peer reviewed; Journal article, 2023)Flashing flow is encountered in many industrial systems involving nozzles, valves and decompression of vessels and pipes. In the context of CO2 capture and storage (CCS), the design of safe and efficient CO2 transportation ... -
HLLC-type methods for compressible two-phase flow in ducts with discontinuous area changes
Log, Alexandra Metallinou; Munkejord, Svend Tollak; Hammer, Morten (Peer reviewed; Journal article, 2021)In this work, the Harten-Lax-van Leer Contact (HLLC) approximate Riemann solver is extended to two-phase flow through ducts with discontinuous cross-sections. Two main strategies are explored regarding the treatment of the ... -
Investigation of non-equilibrium effects during the depressurization of carbon dioxide
Log, Alexandra Metallinou; Munkejord, Svend Tollak; Hammer, Morten; Hafner, Armin; Deng, Han; Austegard, Anders (Chapter, 2022)Predicting the phase change of liquid CO2 during depressurization is highly relevant for the application in refrigeration units and for safety analysis in the context of CO2 capture and storage (CCS). For abrupt depressurization ... -
Towards an engineering tool for the prediction of running ductile fractures in CO2 pipelines
Skarsvåg, Hans Langva; Hammer, Morten; Munkejord, Svend Tollak; Log, Alexandra Metallinou; Dumoulin, Stephane; Gruben, Gaute (Peer reviewed; Journal article, 2023)A prerequisite for the deployment of CO2 capture and storage (CCS) is to establish a large network of high-pressure transport pipelines. It is then vital to assess new and existing pipeline designs for running ductile ...