Abstract. This paper discusses the approach that is being taken for parallelising the WAQUA/Kalma... more Abstract. This paper discusses the approach that is being taken for parallelising the WAQUA/Kalman software of the Dutch Institute for Coastal and Marine Management. This software is used for numerical simulation of flow and transport phenomena in coastal waters and ...
Abstract. The package TRIWAQ is used for simulation of flow and transport in shallow seas and est... more Abstract. The package TRIWAQ is used for simulation of flow and transport in shallow seas and estuaries. Parallelisation of TRIWAQ is needed to reduce the computing time that now puts a restriction to the accuracy of the simulations. Automatic parallelisation is unsuccessful for ...
The numerical algorithm in the simulation package TRIWAQ is analysed for inherent parallelism. On... more The numerical algorithm in the simulation package TRIWAQ is analysed for inherent parallelism. One equation solver that is used for the discretised momentum equations appears to be purely sequential. A comparison with alternative solvers for an advection diffusion test problem indicates however that it is extremely effective on a sequential computer. For larger Courant numbers only the block Jacobi method
Journal of Optimization Theory and Applications, 1995
An iterative method is described that solves the constrained minimization of a convex function, w... more An iterative method is described that solves the constrained minimization of a convex function, when the constraintsg j(x 1,...,x n)≤0 are functions of only a few variables and can be partitioned in some way. A proof of convergence is given which is based on the fact that the function values that are generated decrease. The relation to the nonlinear equation solver TanGS is shown (Ref. 1), together with some new results for TanGS. Finally, the solver is applied to the solution of tangential traction in contact mechanics.
Abstract. This paper discusses the approach that is being taken for parallelising the WAQUA/Kalma... more Abstract. This paper discusses the approach that is being taken for parallelising the WAQUA/Kalman software of the Dutch Institute for Coastal and Marine Management. This software is used for numerical simulation of flow and transport phenomena in coastal waters and ...
Abstract. The package TRIWAQ is used for simulation of flow and transport in shallow seas and est... more Abstract. The package TRIWAQ is used for simulation of flow and transport in shallow seas and estuaries. Parallelisation of TRIWAQ is needed to reduce the computing time that now puts a restriction to the accuracy of the simulations. Automatic parallelisation is unsuccessful for ...
The numerical algorithm in the simulation package TRIWAQ is analysed for inherent parallelism. On... more The numerical algorithm in the simulation package TRIWAQ is analysed for inherent parallelism. One equation solver that is used for the discretised momentum equations appears to be purely sequential. A comparison with alternative solvers for an advection diffusion test problem indicates however that it is extremely effective on a sequential computer. For larger Courant numbers only the block Jacobi method
Journal of Optimization Theory and Applications, 1995
An iterative method is described that solves the constrained minimization of a convex function, w... more An iterative method is described that solves the constrained minimization of a convex function, when the constraintsg j(x 1,...,x n)≤0 are functions of only a few variables and can be partitioned in some way. A proof of convergence is given which is based on the fact that the function values that are generated decrease. The relation to the nonlinear equation solver TanGS is shown (Ref. 1), together with some new results for TanGS. Finally, the solver is applied to the solution of tangential traction in contact mechanics.
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Papers by Edwin Vollebregt