18 Result(s)

Chapter and Conference Paper

Nonlinear Flux Approximation Scheme for Burgers Equation Derived from a Local BVP

We present a novel flux approximation scheme for the viscous Burgers equation. The numerical flux is computed from a local two-point boundary value problem for the stationary equation and requires the iterativ...

J. H. M. ten Thije Boonkkamp, N. Kumar… in Numerical Mathematics and Advanced Applica… (2019)

Chapter and Conference Paper

A Nonlinear Flux Approximation Scheme for the Viscous Burgers Equation

We a nonlinear flux approximation for the discretization of the Burgers equation. We derive the numerical flux function from a local two-point boundary value problem (BVP), which results in a nonlinear...

N. Kumar, J. H. M. ten Thije Boonkkamp… in Finite Volumes for Complex Applications VI… (2017)

Article

Co-expression of fibulin-5 and VEGF₁₆₅ increases long-term patency of synthetic vascular grafts seeded with autologous endothelial cells

Small caliber synthetic vascular grafts are commonly used for bypass surgery and dialysis access sites but have high failure rates because of neointima formation and thrombosis. Seeding synthetic grafts with e...

M Preis, J Schneiderman, B Koren, Y Ben-Yosef, D Levin-Ashkenazi, S Shapiro… in Gene Therapy (2016)

Chapter and Conference Paper

A Sub-cell Discretization Method for the Convective Terms in the Incompressible Navier-Stokes Equations

In this contribution we present a sub-cell discretization method for the computation of the interface velocities involved in the convective terms of the incompressible Navier-Stokes equations. We compute an in...

N. Kumar, J. H. M. ten Thije Boonkkamp… in Spectral and High Order Methods for Partia… (2015)

Chapter and Conference Paper

A New Discretization Method for the Convective Terms in the Incompressible Navier-Stokes Equations

In this contribution we present the use of local one-dimensional boundary value problems (BVPs) to compute the interface velocities in the convective terms of the incompressible Navier-Stokes equations. This t...

N. Kumar, J. H. M. ten Thije Boonkkamp… in Finite Volumes for Complex Applications VI… (2014)

Article

Free-Surface Viscous Flow Solution Methods for Ship Hydrodynamics

The simulation of viscous free-surface water flow is a subject that has reached a certain maturity and is nowadays used in industrial applications, like the simulation of the flow around ships. While almost al...

J. Wackers, B. Koren, H. C. Raven… in Archives of Computational Methods in Engin… (2011)

Chapter and Conference Paper

Fix for Solution Errors near Interfaces in Two-Fluid Flow Computations

A finite-volume method is considered for the computation of flows of two compressible, immiscible fluids at very different densities. A level-set technique is employed to distinguish between the two fluids. A ...

B. Koren, E. H. van Brummelen, P. W. Hemker… in Computational Fluid Dynamics 2002 (2003)

Chapter and Conference Paper

Numerical Solution of Steady Free-Surface Navier-Stokes Flow

The usual time integration approach for solving steady viscous free-surface flow problems has several drawbacks. We propose an efficient iterative method, which relies on a so-called quasi free-surface conditi...

E. H. van Brummelen, H. C. Raven, B. Koren in Computational Fluid Dynamics 2000 (2001)

Chapter

A Godunov-Type Method for Capturing Water Waves

In spite of the absence of shock waves in most hydrodynamic applications, sufficient reason remains to employ Godunov-type schemes in this field. In the instance of two-phase flow, the shock capturing ability ...

E. H. Van Brummelen, B. Koren in Godunov Methods (2001)

Chapter and Conference Paper

Dynamic process composition and communication patterns in irregularly structured applications

In this paper we describe one experiment in which a new coordination language, called Manifold, is used to restructure an existing sequential Fortran code from computational fluid dynamic (CFD), into a parallel a...

C. T. H. Everaars, B. Koren, F. Arbab in Parallel and Distributed Processing (1999)

Chapter and Conference Paper

3D Multigrid on Partially Ordered Sets of Grids

In this paper we discuss different possibilities of using partially ordered sets of grids in multigrid algorithms. Because, for a classical sequence of regular grids the number of degrees of freedom grows much...

P. W. Hemker, B. Koren, J. Noordmans in Multigrid Methods V (1998)

Article

Analysis of preconditioning and multigrid for Euler flows with low-subsonic regions

For subsonic flows and upwind-discretized, linearized 1-D Euler equations, the smoothing behavior of multigrid-accelerated point Gauss-Seidel relaxation is analyzed. Error decay by convection across domain bou...

B. Koren, B. van Leer in Advances in Computational Mathematics (1995)

Chapter and Conference Paper

Monotone, higher-order accurate, multi-dimensional upwinding

B. Koren, H.T.M. van der Maarel in Thirteenth International Conference on Num… (1993)

Chapter and Conference Paper

Multi-D Upwinding and Multigridding for Steady Euler Flow Computations

Multi-dimensional upwind discretizations for the steady Euler equations are studied, with the emphasis on both a good accuracy and a good efficiency. The discretizations consist of a one-dimensional Riemann so...

B. Koren, P. W. Hemker in Proceedings of the Ninth GAMM-Conference o… (1992)

Chapter

A Non-Linear Multigrid Method for the Steady Euler Equations

Higher-order accurate Euler-flow solutions are presented for some airfoil test cases. Second-order accurate solutions are computed by an Iterative Defect Correction process. For two test cases even higher accu...

P. W. Hemker, B. Koren in Numerical Simulation of Compressible Euler Flows (1989)

Chapter and Conference Paper

A nonlinear multigrid method for the efficient solution of the steady Euler equations

An efficient iterative method has been developed for the accurate solution of the non-isenthalpic steady Euler equations for inviscid flow.

P. W. Hemker, B. Koren, S. P. Spekreijse in Tenth International Conference on Numerica… (1986)