Blar i SINTEF Open på forfatter "Lervåg, Karl Yngve"

A robust method for calculating interface curvature and normal vectors using an extracted local level set

Ervik, Åsmund; Lervåg, Karl Yngve; Munkejord, Svend Tollak (Journal article; Peer reviewed, 2014)

The level-set method is a popular interface tracking method in two-phase flow simulations. An often-cited reason for using it is that the method naturally handles topological changes in the interface, e.g. merging drops, ...

A battery electric bus energy consumption model for strategic purposes: Validation of a proposed model structure with data from bus fleets in China and Norway

Hjelkrem, Odd Andre; Lervåg, Karl Yngve; Babri, Sahar; Lu, Chaoru; Södersten, Carl-Johan Hugo (Peer reviewed; Journal article, 2021)

In this paper, an energy model for battery electric buses (Ebus) is proposed. The model is developed based on established models for longitudinal dynamics, using event-based low-frequency data. Since the energy model is ...

Calculation of the interface curvature and normal vector with the level-set method

Lervåg, Karl Yngve; Müller, Bernhard; Munkejord, Svend Tollak (Journal article; Peer reviewed, 2013)

CO2 Capture from Off-shore Gas Turbines Using Supersonic Gas Separation ☆

Hammer, Morten; Wahl, Per Eilif; Anantharaman, Rahul; Berstad, David Olsson; Lervåg, Karl Yngve (Peer reviewed; Journal article, 2014)

CO2 capture from gas turbine based off-shore application face challenges such as size (foot-print), weight and stability (wave motion) in addition to the challenges faced by on-shore industry. Space- and weight challenges ...

A combined fluid-dynamic and thermodynamic model to predict the onset of rapid phase transitions in LNG spills

Lervåg, Karl Yngve; Skarsvåg, Hans Langva; Aursand, Eskil; Ouassou, Jabir Ali; Hammer, Morten; Reigstad, Gunhild Allard; Ervik, Åsmund; Fyhn, Eirik Holm; Gjennestad, Magnus Aashammer; Aursand, Peder; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2020)

Transport of liquefied natural gas (LNG) by ship occurs globally on a massive scale. The large temperature difference between LNG and water means LNG will boil violently if spilled onto water. This may cause a physical ...

Computation of three-dimensional three-phase flow of carbon dioxide using a high-order WENO scheme

Gjennestad, Magnus Aashammer; Gruber, Andrea; Lervåg, Karl Yngve; Johansen, Øyvind; Ervik, Åsmund; Hammer, Morten; Munkejord, Svend Tollak (Journal article; Peer reviewed, 2017)

We have developed a high-order numerical method for the 3D simulation of viscous and inviscid multiphase flow described by a homogeneous equilibrium model and a general equation of state. Here we focus on single-phase, ...

From droplets to process: Multilevel research approach to reduce emissions from LNG processes

Løvseth, Sigurd Weidemann; Snustad, Ingrid; Brunsvold, Amy; Skaugen, Geir; Wahl, Per Eilif; Lervåg, Karl Yngve (Peer reviewed; Journal article, 2015)

In the Enabling Low-Emission LNG Systems project, SINTEF Energy Research and NTNU have since 2009 been developing knowledge and tools with the aim to enable environmental safe, cost-effective, and energy efﬁcient LNG ...

A multiscale porous–resolved methodology for efficient simulation of heat and fluid transport in complex geometries, with application to electric power transformers

Meyer, Ole; Lervåg, Karl Yngve; Ervik, Åsmund (Peer reviewed; Journal article, 2020)

The numerical simulation of fluid flow through a complex geometry with heat transfer is of strong interest for many applications, such as oil-filled power transformers. A fundamental challenge here is that high resolution ...