@book {24008,
	title = {Proceedings of the MekIT{\textquoteright}15 Eighth National Conference on Computational Mechanics.},
	year = {2015},
	publisher = {International Center for Numerical Methods in Engineering (CIMNE).},
	address = {Barcelona, Spain},
	isbn = {97884944244-96},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {feinberg-mekit-2013,
	title = {Uncertainty Quantification of Diffusion in Layered Media by a New Method Based on Polynomial Chaos Expansion},
	journal = {Seventh National Conference on Computational Mechanics MekIT{\textquoteright}13},
	year = {2013},
	publisher = {Akademika Publishing},
	type = {Conference},
	abstract = {We address uncertainty quantification of diffusion processes in layered media, where the properties of the layers and their locations are uncertain and therefore described as stochastic quantities. The method of generalized polynomial chaos expansions is attractive for uncertain quantification in computational mechanics because of its fast convergence. However, the jumps associated with layered media slow down the convergence significantly. In this paper we describe a new technique to circumvent the convergence problem, however this technique requires an extension of the classical polynomial chaos method to handle dependent random variables. We develop a convenient computational way of incorporating dependent random variables in polynomial chaos expansions. Numerical investigations involving porous media flow through two layers demonstrate that the new method can effectively deal with stochastic permeabilities and stochastic location of the permeability jumps. Comparisons with existing methods show a significant increase in the convergence rate.},
	keywords = {Conference},
	author = {Feinberg, Jonathan and Hans Petter {Langtangen}},
	editor = {H. I. {Andersson} and Bj{\o}rn H. {Skallerud}}
}
@inproceedings {Simula.simula.1030,
	title = {CBC.RANS - a New Flexible, Programmable Software Framework for Computational Fluid Dynamics},
	journal = {Sixth national conference on Computational Mechanics (MekIT{\textquoteright}11)},
	year = {2011},
	publisher = {Tapir Academic Press},
	type = {Conference},
	author = {Mortensen, Mikael and Hans Petter {Langtangen} and Myhre, J.},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.simula.1024,
	title = {Flow Patterns and Aerosol Dispersion Inside an Aerosol Test Chamber},
	journal = {Sixth national conference on Computational Mechanics (MekIT{\textquoteright}11)},
	year = {2011},
	publisher = {Tapir Academic Press},
	type = {1},
	author = {Hannibal E. {Fossum} and Bj{\o}rn Anders Petterson {Reif} and Skogan, Gunnar},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.simula.1032,
	title = {Large Eddy Simulations of the Release of Liquified Chlorine From a Pressurized Tank Into the Atmosphere},
	journal = {Sixth national conference on Computational Mechanics (MekIT{\textquoteright}11)},
	year = {2011},
	publisher = {Tapir Academic Press},
	type = {Conference},
	author = {Vik, Thomas and Bj{\o}rn Anders Petterson {Reif}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.simula.1022,
	title = {Modeling the Dispersion and Transport of Aerosols Emitted From Industrial Facility During 2005 and 2008 Outbreaks of Legionnaire{\textquoteright}s Disease in Norway},
	journal = {Sixth national conference on Computational Mechanics (MekIT{\textquoteright}11)},
	year = {2011},
	publisher = {Tapi Academic Press},
	type = {Conference},
	author = {Hannibal E. {Fossum} and Tutkun, Murat and Bj{\o}rn Anders Petterson {Reif} and Andreassen, {\O}yvind},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.simula.1026,
	title = {Verification of Markovian Properties of Turbulent Boundary Layer at High Reynolds Number},
	journal = {Sixth national conference on Computational Mechanics (MekIT{\textquoteright}11)},
	year = {2011},
	publisher = {Tapir Academic Press},
	type = {1},
	author = {Fredbo, M. and Tutkun, Murat},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.sc.692,
	title = {Implicit Interaction of Two Rigid Mitral Leaflets in a Partitioned Fluid-Structure Approach},
	journal = {MekIT{\textquoteright}09. Fifth~~national~~conference~~on~~Computational~~Mechanics},
	year = {2009},
	month = {May},
	pages = {135-149},
	publisher = {NTNU},
	type = {Conference},
	address = {Trondheim},
	abstract = {The aim of our study was twofold. First, to develop an implicit algorithm accounting for interaction of two rigid, asymmetric mitral leaflets in a partitioned, fluid-structure interaction simulation. Second, to study the impact of the imposed inlet conditions on the mitral valve movement during diastolic filling. Two-dimensional simulations with a transient patient-specific left ventricle geometry were carried out to test the algorithm, to introduce a higher degree of physiological realism in the simulations, and to reduce the computational cost. Two different inlet configurations were tested. The results indicate that the inlet configuration has significant impact on intramitral flow and the movement of the mitral leaflets during diastole.},
	isbn = {978-82-519-2421-4},
	author = {Sigrid Kaarstad {Dahl} and Vierendeels, Jan and Degroote, Joris and Annerel, Sebastiaan and Bj{\o}rn H. {Skallerud} and Leif Rune {Hellevik}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@book {Simula.sc.1022,
	title = {MekIT{\textasciiacute}09. Fifth National Conference on Computational Mechanics},
	year = {2009},
	month = {June},
	publisher = {Tapir Academic Press},
	isbn = {9788251924214},
	author = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.568,
	title = {On the Performance of an Algebraic Multigrid Preconditioner for the Pressure Equation With Highly Discontinuous Media},
	journal = {MekIT{\textquoteright}09.~~Fifth~~national~~conference~~on~~Computational~~Mechanics},
	year = {2009},
	month = {May},
	pages = {191-204},
	publisher = {NTNU},
	type = {Conference},
	abstract = {We study the performance of an algebraic multigrid (AMG) preconditioner combined with conjugate gradient-type methods for the pressure equation in the presence of strong discontinuity of the permeability. Such discontinuities are problematic for iterative solvers, due to the dependence of the condition number of the discretized linear system of equations on the magnitude of the discontinuities. We identify two separate causes of such ill-conditioning, and assess how well the AMG preconditioner handles these. For the more difficult problems, we discuss techniques to modify the model to allow iterative solutions.},
	isbn = {978-82-519-2421-4},
	author = {Joachim Berdal {Haga} and Hans Petter {Langtangen} and Nielsen, Bj{\o}rn Fredrik and Osnes, Harald},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.sc.1002,
	title = {Predicting Particle Deposition in the Human Airways With RANS},
	journal = {MekIT{\textasciiacute}09. Fifth national conference on Computational Mechanics},
	year = {2009},
	note = {Listed in 2009 annual report as "A comparison of RANS Turbulence Models for Simulation of Flow in the Human Respiratory System"},
	month = {June},
	publisher = {Tapir akademisk forlag},
	type = {Conference},
	isbn = {9788251924214},
	author = {H. E. {Fossum} and Bj{\o}rn Anders Petterson {Reif}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.sc.698,
	title = {Simulating Heart Valve Dynamics in FEniCS},
	journal = {MekIT{\textasciiacute}09. Fifth National Conference on Computational Mechanics},
	year = {2009},
	pages = {411-419},
	publisher = {Tapir Akademisk Forlag},
	type = {1},
	isbn = {978-82-519-2421-4},
	author = {Selim, Kristoffer and Logg, Anders},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.sc.1006,
	title = {Subject Specific Finite Element Analysis of Callus Distraction - a Preliminary Study},
	journal = {Fifth national conference on Computational Mechanics (MekIT{\textasciiacute}09)},
	year = {2009},
	month = {June},
	publisher = {Tapir akademisk forlag},
	type = {Conference},
	isbn = {9788251924214},
	author = {Sune Hansborg {Pettersen} and Aamodt, A. and Olav A. {Foss} and Bj{\o}rn H. {Skallerud}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.578,
	title = {Using Cython to Speed Up Numerical Python Programs},
	journal = {MekIT{\textasciiacute}09.~~Fifth~~national~~conference~~on~~Computational~~Mechanics},
	year = {2009},
	pages = {495-512},
	publisher = {NTNU},
	type = {Conference},
	abstract = {The present study addresses a series of techniques for speeding up numerical calculations in Python programs. The techniques are evaluated in a benchmark problem involving finite difference solution of a wave equation. Our aim is to find the optimal mix of user-friendly, high-level, and safe programming in Python with more detailed and more error-prone low-level programming in compiled languages. In particular, we present and evaluate Cython, which is a new software tool that combines high- and low-level programming in an attractive way with promising performance. Cython is compared to more well-known tools such as F2PY, Weave, and Instant. With the mentioned tools, Python has a significant potential as programming platform in computational mechanics.},
	isbn = {978-82-519-2421-4},
	author = {Wilbers, Ilmar and Hans Petter {Langtangen} and {\O}deg{\r a}rd, {\r A}smund},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.54,
	title = {Efficient Representation of Computational Meshes},
	journal = {MekIT{\textquoteright}07. Fourth National Conference on Computational Mechanics},
	year = {2007},
	publisher = {Tapir Akademisk Forlag},
	type = {Conference},
	isbn = {9788259122357},
	author = {Logg, Anders},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.77,
	title = {A First-Approach Towards Patient-Specific 2D FSI-Simulation of Mitral Valve Dynamics During Diastolic Filling},
	journal = {MekIT-07, Fourth national conference on Computational Mechanics},
	year = {2007},
	pages = {175-184},
	publisher = {Tapir Academic Press},
	type = {Conference},
	address = {Trondheim},
	abstract = {The mitral valve controls the flow of blood into the ventricle during diastole and prevents backflow into the atrium in systole. The two mitral valve leaflets have significantly different geometries. The dynamics of the leaflets and their influence on the transmitral and intraventricular flow is a controversial topic. In this paper we report results from work in progress on fluid structure interaction simulations of the mitral leaflets during left ventricular filling. The aim of the present study was to assess the impact of left ventricular initial pressures and vortices on the mitral leaflet dynamics. An explicitly coupled fluid structure interaction scheme was utilized for the numerical simulations. A 2D transient representation of the left ventricular wall movement was imposed as boundary conditions for the simulations. The left ventricular wall was rendered by ultrasound recordings, and speckle tracking was used for transient tracking of the wall movement during diastole. Thus, the structural calculations are simplified and involve only the mitral valves. The ultrasound measurements were used both for validation/comparison with the simulated mitral valve dynamics as well as for imposition of the left ventricular wall movement. Our simulations show that the initial pressure configuration in the left heart is significant for the mitral valve dynamics. The simulations also indicate that the mitral valve flutter has important bearings on the vortex formation in the vicinity of the mitral valves.},
	isbn = {978-82-519-2235-7},
	author = {Leif Rune {Hellevik} and Sigrid Kaarstad {Dahl} and Bj{\o}rn H. {Skallerud}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.20,
	title = {Lattice Boltzmann Method and Turbidity Flow Modeling},
	journal = {MekIT{\textquoteright}07 : Fourth National Conference in Computational Mechanics},
	year = {2007},
	month = {May},
	pages = {213-228},
	publisher = {Tapir Academic Press},
	type = {Conference},
	abstract = {We discuss the Lattice Boltzmann method (LBM), which provides a new way of thinking on complex, multiphase fluid flow problems. We present the basics of the LBM as well as its origins in the Cellular Automata. The particle-based nature of the LBM makes it well suited to study fluid-boundary interfaces. We then commence to sketch advanced applications like particle suspension problems and we show how the LBM can be applied on turbidity currents, a challenging fluid flow problem. We show that the LBM has a good deal of versatility in modeling physical systems.},
	isbn = {978-82-519-2235-7},
	author = {Al-Khayat, Omar and Are Magnus {Bruaset} and Hans Petter {Langtangen}},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {Simula.SC.18,
	title = {Parallelisation and Numerical Performance of a 3D Model for Coupled Deformation, Fluid Flow and Heat Transfer in Sedimentary Basins},
	journal = {MekIT{\textquoteright}07. Fourth National Conference on Computational Mechanics},
	year = {2007},
	month = {May},
	pages = {151-162},
	publisher = {Tapir Academic Press},
	type = {Conference},
	address = {Trondheim},
	abstract = {In this paper, we present some parallel performance results for a 3D simulator of coupled deformation, fluid flow and heat transfer in sedimentary basins. The model parameters are derived from an industry simulator, with realistic material properties and complex irregular grids of up to 1.5 million nodes with 7.3 million degrees of freedom. We have performed parallelisation on the linear algebra level using the ML algebraic multigrid preconditioner with iterative methods in the Diffpack finite element framework. Implementation and speedup results are presented.},
	isbn = {978-82-519-2235-7},
	author = {Joachim Berdal {Haga} and Are Magnus {Bruaset} and Cai, Xing and Hans Petter {Langtangen} and Osnes, Harald and Skogseid, Jakob},
	editor = {Bj{\o}rn H. {Skallerud} and H. I. {Andersson}}
}
@inproceedings {SC.5.Langtangen.2001,
	title = {Propagation of Large Destructive Waves},
	journal = {Computational Mechanics (MekIT{\textquoteright}01)},
	year = {2001},
	publisher = {Tapir},
	type = {1},
	author = {Hans Petter {Langtangen} and Pedersen, G.},
	editor = {H. I. {Andersson} and Bj{\o}rn H. {Skallerud}}
}
@inproceedings {SC.5.Langtangen.2001.a,
	title = {A Software Framework for Easy Parallelization of PDE Solvers},
	journal = {Proceedings of Parallel Computational Fluid Dynamics 2000},
	year = {2001},
	publisher = {North Holland},
	type = {1},
	author = {Hans Petter {Langtangen} and Cai, Xing},
	editor = {C. B. {Jensen} and Kvamsdal, T. and H. I. {Andersson} and Pettersen, B. and Ecer, A. and P{\'e}riaux, J. and Satofuka, N. and Fox, P.}
}
