Blar i NTNU Open på forfatter "Andersson, Helge Ingolf"

A novel approach to rigid spheroid models in viscous flows using operator splitting methods
Tapley, Benjamin; Celledoni, Elena; Owren, Brynjulf; Andersson, Helge Ingolf (Peer reviewed; Journal article, 2019)Calculating costeffective solutions to particle dynamics in viscous flows is an important problem in many areas of industry and nature. We implement a secondorder symmetric splitting method on the governing equations for ... 
Numerical investigation of freestream turbulence effects on the transitioninwake state of flow past a circular cylinder
Aarnes, Jørgen Røysland; Andersson, Helge Ingolf; Haugen, Nils Erland L (Journal article; Peer reviewed, 2018)We investigate how a turbulent freestream (TFS) affects the transitioninwake state of flow past a cylinder. Direct numerical simulations of a decaying TFS flow past a cylinder have been performed, where the intensity ... 
Numerical Solutions of Three Dimensional Von Kármán and Bödewadt Heat and Fluid Flow Problems
Rahman, Muhammad (Doctoral theses at NTNU;2018:77, Doctoral thesis, 2018) 
Numerisk simulering av strømning omkring anisotrope partikler
HanssenBauer, Øyvind W (Master thesis, 2013)I denne studien er uniform strømning og lineær skjærstrømning omkring partikler ved lave Reynoldstall simulert ved hjelp av den åpne programvaren OpenFOAM. Fra resultatene framkommer det at ved uniform strømning avtar ... 
Numerisk simulering av strømning omkring anisotrope partikler
HanssenBauer, Øyvind W (Master thesis, 2013)I denne studien er uniform strømning og lineær skjærstrømning omkring partikler ved lave Reynoldstall simulert ved hjelp av den åpne programvaren OpenFOAM. Fra resultatene framkommer det at ved uniform strømning avtar ... 
On heat transfer in Bödewadt flow
Rahman, Muhammad; Andersson, Helge Ingolf (Journal article, 2017)Heat transfer in revolving Bo¨dewadt flow above a planar surface has been considered. We have shown that a similarity solution of the thermal energy problem does not exist as long as the surface is impermeable. The failure ... 
On vortex shedding from a hexagonal cylinder
Khaledi, Alidoosti Hatef; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2011) 
Particle segregation in turbulent CouettePoiseuille flow with vanishing wall shear
Yang, Kun; Zhao, Lihao; Andersson, Helge Ingolf (Journal article, 2017)Inertial particles dispersed in wallbounded flows in pipes and channels are known to accumulate close to the walls. The segregation ability depends greatly on the inertiaselection effects of the nearwall quasicoherent ... 
Preferential orientation of tracer spheroids in turbulent channel flow
Jie, Yucheng; Zhao, Lihao; Xu, Chunxiao; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2019)Axissymmetric spheroids, such as rodlike and disklike particles, have been found to orient preferentially in nearwall turbulence by both experiment and numerical simulation. In current work we examined the orientation ... 
Preferential particle concentration in wallbounded turbulence with zero skin friction
Yang, Kun; Zhao, Lihao; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2017)Inertial particles dispersed in turbulence distribute themselves unevenly. Besides their tendency to segregate near walls, they also concentrate preferentially in wallparallel planes. We explore the latter phenomenon in ... 
Recent Developments and New Results on The Flow Around an Inclined 6:1 Prolate Spheroid
Strandenes, Håkon; Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (Chapter, 2017)In the light of new computational resources and improved simulation tools we present new simulations of the flow around an inclined 6:1 prolate spheroid. We present the development of the flow from the symmetric and laminar ... 
Revolving flow of a fluidparticle suspension with suction
Rahman, Muhammad; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2018)The threedimensional revolving flow of a particlefluid suspension above a plane surface is considered. The flow represents an extension of the classical Bödewadt flow to a twofluid problem. The governing equations for ... 
Simple Geometry – Complex Flow A computational study of turbulent particleladen flows impinging on a cylinder
Aarnes, Jørgen Røysland (Doctoral theses at NTNU;2018:307, Doctoral thesis, 2018)Direct numerical simulations were performed to study the effects of freestream turbulence on different flow regimes past a circular cylinder. The focus was on the transitioninwake state of the flow and particle impact ... 
Simulering av turbulent swirlstrømning gjennom et dobbelt rørbend
Moe, Kjetil Birkeland (Master thesis, 2010)Numeriske simuleringer blir utført for å undersøke hvordan swirlstrømning kan bidra til trykktapsreduksjon over rørbend. Fire individuelle sammenligninger gjøres først mot publiserte eksperimentelle data av Eggels, Wu & ... 
Turbulent Couette–Poiseuille flow with zero wall shear
Yang, Kun; Zhao, Lihao; Andersson, Helge Ingolf (Journal article, 2017)A particular pressuredriven flow in a plane channel is considered, in which one of the walls moves with a constant speed that makes the mean shear rate and the friction at the moving wall vanish. The Reynolds number ... 
Turbulent Incompressible Wake Flow in a Rectangular Channel: High speed PIV experiment and LES simulation
Nilsen, Katrine Marsteng (Master thesis, 2011)Turbulence is a ubiquitous phenomenon of highly complex flow. With increasing computer capacity and steadily improving numerical methods Computational Fluid Dynamics (CFD) is becoming a beneficial tool in the study of ... 
Turbulent wake behind a concave curved cylinder
Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (Journal article; Peer reviewed, 2019)We present a detailed study of the turbulent wake behind a quarterofring curved cylinder at Reynolds number Re = 3900 (based on cylinder diamter and incoming ow velocity), by means of Direct Numerical Simulation (DNS). ... 
Vortex dislocation mechanisms in the near wake of a step cylinder
Tian, Cai; Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf (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 threedimensional Navier–Stokes equations. In accordance with previous ... 
Wake behind a concave curved cylinder
Jiang, Fengjian; Pettersen, Bjørnar; Andersson, Helge Ingolf; Kim, Jongmin; Kim, Sungtae (Journal article; Peer reviewed, 2018)The wake behind a quarterofring 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 ...