Blar i NTNU Open på forfatter "Müller, Bernhard"

Adaption of a two phase solver for axisymmetric problems
Liestøl, Lars (Master thesis, 2012)This report documents the adaptation of a two dimensional two phaseNavierStokes solver to axisymmetric problems. The changes fromCartesian to cylindrical coordinates are thoroughly described with finitedifference methods ... 
Adaptiv gitterforfining for Euler ligningene av gassdynamikk
Kristoffersen, Frederik (Master thesis, 2019)En finitt volumløser som benytter adaptiv gitterforfining på ustrukturerte gitter har blitt utviklet for de to dimensjonale Eulerligningene for gassdynamikk. Løseren bruker den eksplisitte Eulermetoden og Rusanovmetoden ... 
Boundary conditions for the lattice Boltzmann method: Mass conserving boundary conditions for moving walls
le coupanec, erwan (Master thesis, 2010)Based on the noslip boundary condition for walls at rest for the lattice Boltzmann BathnagarGrossKrook method by J.C.G. Verschaeve [Phys. Rev. 80,036703 (2009)], a noslip boundary condition for walls with a tangential ... 
Calculation of the interface curvature and normal vector with the levelset method
Lervåg, Karl Yngve; Müller, Bernhard; Munkejord, Svend Tollak (Journal article, 2013)This article addresses the use of the levelset method for capturing the interface between two fluids. One of the advantages of the levelset method is that the curvature and the normal vector of the interface can be readily ... 
Cartesian grid methods for the compressible NavierStokes equations
Skøien, Are Arstad (Master thesis, 2012)A Cartesian grid method has been developed for solving the 2D Euler and NavierStokes equations for viscous and inviscid compressible flow, respectively. Both steady and unsteady flows have been considered. Using a simplified ... 
CFD Analysis of a Microfluidics LabonaChip Component
Linnerud, Ane Solhaug (Master thesis, 2010)The idea of a LabonaChip is to integrate a laboratory on a small chip. This makes the LabonaChip technology dependent on the knowledge of microfludics. The goals of this project were to model, and then analyse and ... 
CFD Simulations of Turbulent Flow in the Human Upper Airways
Aasgrav, Elin; Johnsen, Sverre Gullikstad; Simonsen, Are Johan; Müller, Bernhard (Chapter, 2017)In this paper, investigations are conducted using Reynoldsaveraged NavierStokes (RANS) turbulence models to investigate the importance of turbulence modelling for nasal inspiration at a constant flow rate of 250 ml/s. ... 
CFD Simulations of Turbulent Flow in the Human Upper Airways
Aasgrav, Elin; Johnsen, Sverre Gullikstad; Simonsen, Are Johan; Müller, Bernhard (Chapter, 2017)In this paper, investigations are conducted using Reynoldsaveraged NavierStokes (RANS) turbulence models to investigate the importance of turbulence modelling for nasal inspiration at a constant flow rate of 250 ml/s. ... 
Computational study of flow–induced oscillation of a simplified soft palate
Khalili, Mohammadtaghi; Larsson, Martin; Müller, Bernhard (Chapter, 2017)Twodimensional numerical simulations are employed to study fluid structure interaction of a simplified model of the soft palate in the pharynx for uniform inhalation. We take a next step towards a better biomechanical ... 
Curved Boundary Conditions for the Lattice Boltzmann Method
Mossige, Endre Joachim (Master thesis, 2011)The lattice Boltzmann method is a modern method in computational fluid dynamics. Its primary use is the simulation of incompressible flows. It has computational advantages over conventional methods like the finite volume ... 
Development of an immersed boundary method for simulating contaminated fluid interfaces in twophase flow
Lysgaard, Morten Olsen (Master thesis, 2015)This thesis covers the theory and implementation, verification and validation of an immersed boundary method for simulating the effect of an elastic membrane covering water drops in crude oil. First an introduction to ... 
Experimental and computational studies of water drops falling through model oil with surfactant and subjected to an electric field
Ervik, Åsmund; Hellesø, Svein Magne; Munkejord, Svend Tollak; Müller, Bernhard (Chapter, 2014)The behaviour of a single submillimetresize water drop falling through a viscous oil while subjected to an electric field is of fundamental importance to industrial applications such as crude oil electrocoalescers. ... 
Experimental Study of FluidStructure Interaction in a Simplified Geometry of the Human Upper Airways
Broschek, Benjamin; Golpe Sonora, Cintia Maria (Master thesis, 2015)OSAS (Obstructive Sleep Apnoe Syndrome) is a sleep related breathing disorder caused by repetitive collapses of the pharyngeal walls during sleep. The objective of this project is to supply experimental data to validate ... 
Film boiling and rapid phase transition of liquefied natural gas
Aursand, Eskil (Doctoral theses at NTNU;2019:70, Doctoral thesis, 2019)When liquefied natural gas (LNG) is spilled onto water there is a possibility that explosive rapid phase transition (RPT) events occur. According to experiments, these vapor explosions are highly unpredictable, with yields ... 
FluidStructure Interaction and Immersed Boundary Method for the Compressible Navier–Stokes Equations Using High Order Methods
Khalili, Ehsan (Doctoral theses at NTNU;2018:30, Doctoral thesis, 2017)There has been a growing interest in the study of biological flows in biomechanical systems in recent years. Such flows mostly appear in domains with complex geometries, flexible moving boundaries and usually involve ... 
FluidStructure Interaction in Compressible Viscous Flow
Ringstad, Knut Emil (Master thesis, 2018)In this master's thesis a ghostpoint immersed boundary method for the compressible NavierStokes equations using higher order summation by parts operators is described and implemented for twoway coupled fluidstructure ... 
High Order Numerical Simulation of Viscous Compressible Flow in a Simplified Geometry of the Human Upper Airways
Tisovská, Petra (Master thesis, 2017)This master thesis is part of a project dealing with Obstructive sleep apnea syn drome (OSAS). Its main goal is to extend an existing 2D code for compress ible flow into the third dimension and verify it. The code solves ... 
Highorder ghostpoint immersed boundary method for viscous compressible flows based on summationbyparts operators
Khalili, Mohammadtaghi; Larsson, Martin; Müller, Bernhard (Journal article; Peer reviewed, 2019)A high‐order immersed boundary method is devised for the compressible Navier‐Stokes equations by employing high‐order summation‐by‐parts difference operators. The immersed boundaries are treated as sharp interfaces by ... 
Immersed boundary method for the compressible NavierStokes equations using high order summationbyparts difference operators
Khalili, Mohammadtaghi; Larsson, Martin; Müller, Bernhard (Chapter, 2017)A ghostpoint immersed boundary method is devised for the compressible Navier–Stokes equations by employing high order summationbyparts (SBP) difference operators. The immersed boundaries are treated as sharp interfaces ... 
Immersed boundary method for viscous compressible flows around moving bodies
Khalili, Mohammadtaghi; Larsson, Martin; Müller, Bernhard (Journal article; Peer reviewed, 2018)A ghostpoint immersed boundary method for the compressible Navier–Stokes equations with moving boundaries on fixed Cartesian grids is devised by employing high order summationbyparts (SBP) difference operators. The ...