Klaus Johannsen - Publications

Publications

Journals

1. UG - A Flexible Software Toolbox for Solving Partial Differential Equations, P. Bastian, K. Birken, K. Johannsen, S. Lang, K. Eckstein, N. Neuss, H. Rentz-Reichert, C. Wieners, Computing and Visualization in Science, 1:27-40, 1997, [ug.pdf].
2. Robust Smoothers for Convection-Diffusion Problems with Closed Characteristics, K. Johannsen, Computing, 65: 203-225, 2000, [rs.pdf].
3. The saltpool benchmark problem - numerical simulation of saltwater upconing in a porous medium, K. Johannsen, W. Kinzelbach, S. Oswald, G. Wittum, Advances in Water Resources, 25 (3) (2002) pp. 335-348, [saltpool.pdf].
4. On the validity of the Boussinesq approximation for the Elder problem, K. Johannsen, Computational Geosciences 7(3): 169-182; Jan 2003, [elder.pdf].
5. Numerical simulation of three-dimensional saltwater-freshwater fingering instabilities observed in a porous medium, K. Johannsen, R. Held, W. Kinzelbach, S. Oswald, Advances in Water Resources, 29(11): 1690-1704; Nov 2006, [fing.pdf].

6. A SOR-type smoother for strongly non-symmetric positive definite matrices, K. Johannsen, G. Wittum, submitted to: Computing, [sor.pdf].
7. A Symmetric Smoother for the Nonsymmetric Interior Penalty Discontinuous Galerkin Discretization, K. Johannsen, submitted to: Numerical Linear Algebra with Applications, [nipg.pdf].
8. Multigrid Methods for Nonsymmetric Interior Penalty Discontinuous Galerkin Methods, K. Johannsen, submitted to: Computing and Visualization in Science, [nipg4cvs.pdf].
9. Density-dependent dispersion in heterogeneous porous media 1: Numerical and statisctical convergence, A.J. Landman, K. Johannsen, R. Schotting, submitted to: Advances in Water Resources.

Books

1. Robust Multigrid Methods for the Convection-Diffusion Equation with non-vanishing Vorticity (in German), K. Johannsen, Teubner 2000, ISBN: 3-519-02747-X, [diss.pdf].
2. Numerical Aspects of Density Driven Flow in Porous Media (in German), K. Johannsen, Professorial Dissertation (Habilitation), University of Heidelberg, [habil.pdf].

Reports, proceedings

1. Teilchenaspekte im Schroermodell, K. Johannsen, Master thesis, Hamburg University, 1991.
2. A Mathematical Description of (Open) Loudspeaker-Boxes, K. Johannsen, Preprint 93-23, Heidelberg University, 1993.
3. Aligned 3D-Finite-Volumes for convection-diffusion problems, K. Johannsen, in: Finite Volumes for Complex Applications, F. Benkhaldoun, R. Vilsmeier (eds), Hermes, Paris, 291-300, 1996.
4. An Aligned 3D-Finite-Volume Method for Convection-Diffusion Problems, K. Johannsen, in: Modeling and Computation in Environmental Sciences, R. Helmig, W. Jäger, W. Kinzelbach, P. Knabner, G. Wittum (eds), Vieweg, Braunschweig, 59:227-243, 1997.
5. d3f - Ein Programmpaket zur Modellierung von Dichteströmungen, E: Fein (ed.), GRS, Braunschweig, GRS-139, ISBN 3-923875-97-5, 1998.
6. Parallel unstructured grid computations, P. Bastian, K. Birken, K. Johannsen, S. Lang, N. Neuss, H. Rentz-Reichert, and C. Wieners, In W. Hackbusch, editor, Proceedings of the 14th GAMM Seminar Kiel, Notes on Numerical Fluid Mechanics. Vieweg, 1998, [gamm14.pdf].
7. Parallel adaptive solution techniques for groundwater flow problems, P. Bastian, K. Johannsen, B. Huurdeman, In Proceedings of the SIAM Conference on Parallel Processing, San Antonio, 1999.
8. Robuste Mehrgitterverfahren für die Konvektions-Diffusions Gleichung mit wirbelbehafteter Konvektion, K. Johannsen, Preprint 1999-27, Heidelberg University, 1999, [diss.pdf].
9. A parallel software-platform for solving problems of partial differential equations using unstructured grids and adaptive multigrid methods, P. Bastian, K. Birken, K. Johannsen, S. Lang, V. Reichenberger, C. Wieners, G. Wittum, C. Wrobel, in: High performance computing in science and engineering, E. Krause W. Jäger (eds), Springer, 326-339, 1999, [hlrs99.pdf].
10. UG Tutorial, P. Bastian, K. Johannsen, and V. Reichenberger, 1999, [UG-Tutorial.pdf], [UG-home].
11. Advances in High-performance Computing: Multigrid Methods for Partial Differential Equations and its Applications, P. Bastian, K. Johannsen, S. Lang, S. Nägele, V. Reichenberger, C. Wieners, G. Wittum, C. Wrobel, in: High performance computing in science and engineering, E. Krause, W. Jäger, (eds), Springer, 506-519, 2000, [hlrs00.pdf].
12. Numerische Simulation dichtegetriebener Strömung in porösen Medien, K. Johannsen, H. Gernert, W. Juling, G. Wittum, in: RZ-News des Rechenzentrums der Universität Karlsruhe, Nummer 2000/9, 10, ISSN 1432-7015, [rzk.pdf].
13. Advances in High-performance Computing: High-accuracy simulation of density driven flow in porous media, P. Bastian, K. Johannsen, S. Lang, V. Reichenberger, C. Wieners, G. Wittum, in: High performance computing in science and engineering, E. Krause, W. Jäger, (eds), Springer, 2001, [hlrs01.pdf].
14. The Elder Problem - Bifurcations and steady state solutions, K. Johannsen, in: Computational Methods in Water Resources, S.M. Hassanizadeh et. al. (eds), 47(1), pp. 485-492, 2002, [cmwr02.pdf].
15. The importance of dispersive mixing for modelling of density-dependent and reactive transport, E. Oswald, K. Johannsen, W. Huang, in: Computational Methods in Water Resources, S.M. Hassanizadeh et. al. (eds), 47(1), pp. 501-506, 2002.
16. A Symmetric Smoother for the Nonsymmetric Interior Penalty Discontinuous Galerkin Discretization, K. Johannsen, ICES Report 05-23, University of Texas at Austin, 2005, [nipg.pdf].
17. Multigrid Methods for NIPG, K. Johannsen, ICES Report 05-31, University of Texas at Austin, 2005, [mg4nipg.pdf].
18. A robust 9-point ILU smoother for anisotropic problems, K. Johannsen, IWR Preprint 10/2005, Heidelberg University, [ilu.pdf].
19. Numerical Aspects of Density Driven Flow in Porous Media, K. Johannsen, Proceedings of the CMWR XVI, Copenhagen, Denmark, June 19-22, 2006, [cmwr06.pdf].

(Last Updated: 2006-11-30)