Blar i NTNU Open på forfatter "Pettersen, Bjørnar"

Comparison of LES and DNS for the flow past a circular cylinder with fairings
Strandenes, Håkon; Canabes, José Patricio Gallardo; Pettersen, Bjørnar; Andersson, Helge Ingolf (Peer reviewed, 2015) 
Direct Numerical Simulation of turbulent wakes behind different plate configurations
Dadmarzi, Fatemeh Hoseini (Doctoral theses at NTNU;2017:123, Doctoral thesis, 2017)The physics of complex threedimensional wake behind multiple flat plates is studied by means of direct numerical simulations (DNS). The interaction and interference effects between the wakes behind two configurations of ... 
Experimental investigation of the superposition principle for a free surface roll damping tank
Elger, David Emanuel (Master thesis, 2014)Roll stabilizing tanks are widely used on offshore supply vessels and fishing vessels to ensure a better and safer working environment. However, the free surface of a partially filled tank is subject to sloshing. On one ... 
Experimental Study on the Hydrodynamic Forces acting on Objects in a Moonpool
Aspelund, Leiv (Master thesis, 2013)This master thesis describes and discusses an experimental study on the hydrodynamic forces acting on objects in a moonpool, carried out at MARINTEK in 2013. The experiments were done using a simplified 2dimensional ... 
Hydrodynamic Analysis of a Floating Renewable Energy Device
Akselsen, Anders Matias (Master thesis, 2019)Denne studien dekker en hydrodynamisk vurdering av en bølgeenergikonverterer, og av typen punktabsorberer begrenset til å bevege seg i hiv. Mange vanlige analyseverktøy som brukes til å evaluere punktabsorberende ... 
Hydrodynamiske beregninger med bølgeoverflater
Kopperstad, Andreas (Master thesis, 2011)Innledningsvis ble noe av det teoretiske grunnlaget for oppgaven gitt. De viktigste antagelsene var at strømningen er isotermisk og at fluidene er antatt å være inkompressible. Videre er det gått igjennom hvodan man setter ... 
Hydroelastic Analysis of Flexible Wedges
Aagaard, Olav (Master thesis, 2013)This thesis presents a simulation method for analyzing the coupled water entry problem of elastic bodies. The water entry problem is investigated using the software STAR CCM+ for computational fluid dynamics and Abaqus for ... 
Influence of spanwise noslip boundary conditions on the flow around a cylinder
Strandenes, Håkon; Pettersen, Bjørnar; Andersson, Helge Ingolf; Manhart, Michael (Journal article; Peer reviewed, 2017)First we present high resolution large eddy simulations (LES) for the flow past a circular cylinder at Reynolds number 3900 to prove the quality of the simulations. A thorough grid convergence study is presented, and the ... 
Influences of upstream extensions on flow around a curved cylinder
Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2018)In simulations of flow around a concave curved cylinder, i.e. freestream aligned with the plane of curvature and directed towards the inner face of the curvature, one cannot avoid interactions between the cylinder and the ... 
Interaction between bodies in a viscous flow
Hovrud, Jan Marius (Master thesis, 2011)Using the opensource CFDsolver OpenFOAM with a numerical scheme which is first order in time and second order in space, calculations of unsteady 3D flow around two cylinders in tandem arrangement at low Reynolds number ... 
Investigation of the Wake Flow behind a stepped circular Cylinder using Particle Image Velocimetry
Teutsch, Ina (Master thesis, 2012)Subject of the present study was the investigation of the wake behind stepped circular cylinders. Experiments were performed using particle image velocimetry (PIV). Cylinder models with diameter ratios D/d=1, D/d=6/5 and ... 
Large Eddy Simulations of flow around a circular cylinder close to a flat seabed
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article, 2016)Large Eddy Simulations (LES) with Smagorinsky subgrid scale model are used to study the turbulent flow and wake dynamics behind a circular cylinder close to a horizontal, plane wall at subcritical Reynolds number. The focus ... 
Large Eddy Simulations of Flow around a Circular Cylinder in the Vicinity of a Wall at Reynold Number of 13100
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter, 2013)The flow around a circular cylinder in the vicinity of a rigid wall at Reynolds number 13100 is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale model. The main purpose of the present work is to ... 
Large Eddy Simulations of flow around a smooth circular cylinder in a uniform current in the subcritical flow regime
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article; Peer reviewed, 2014)Threedimensional flow around a circular cylinder in a steady, uniform current at subcritical Reynolds numbers (Re) is investigated. The flow is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale ... 
Large Eddy simulations of flow around tandem circular cylinders in the vicinity of a plane wall
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article; Peer reviewed, 2018)To investigate the threedimensional flow around freespanning, tandem marine pipelines, Large Eddy Simulations (LES) with Smagorinsky subgrid scale model are performed using the opensource code OpenFOAM. Two circular ... 
Large Eddy Simulations of Flow Around Tandem Cylinders Close to a Horizontal Wall
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article; Peer reviewed, 2015)This study focuses on the numerical simulations of the flow around tandem cylinders placed in the vicinity of a rigid, horizontal plane wall. The cylinders are immersed close to a plane wall in a steady current with a ... 
Large Eddy Simulations of ThreeDimensional Flow Around a Pipeline in a Uniform Current
Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter; Peer reviewed, 2012)Threedimensional (3D) modeling of the flow around a circular cylinder in a steady, uniform current subjected to low and intermediate Reynolds numbers (Re) is considered. Large eddy simulations (LES) are used to simulate ... 
Largeeddy simulations of crossflow around ship sections
Arslan, Tufan (Doctoral thesis at NTNU;2016:111, Doctoral thesis, 2016)This thesis reports numerical simulations of threedimensional (3D) unsteady cross flow over two ship sections located sidebyside. The ship sections have different breadth and draft conditions which represent typical ... 
LES of Flow Around Tandem Cylinders Close to a Horizontal Wall
AbrahamsenPrsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter, 2015)This study focuses on the numerical simulations of the flow around tandem cylinders placed in the vicinity of a rigid, horizontal, plane wall. The cylinders are immersed close to a plane wall in a steady current with a ... 
Lowfrequency oscillations in flow past an inclined prolate spheroid
Strandenes, Håkon; Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2019)We analyse the forces on a 45∘ inclined 6:1 prolate spheroid at Reynolds number ReD = 8000. In contrast to flow at lower Reynolds numbers previously investigated, we now find a strong oscillatory behaviour in the global ...