Print Email Facebook Twitter Transport modelling in coastal waters using stochastic differential equations Title Transport modelling in coastal waters using stochastic differential equations Author Charles, W.M. Contributor Heemink, A.W. (promotor) Faculty Electrical Engineering, Mathematics and Computer Science Date 2007-03-29 Abstract In this thesis, the particle model that takes into account the short term correlation behaviour of pollutants dispersion has been developed. An efficient particle model for sediment transport has been developed. We have modified the existing particle model by adding extra equations for the suspension using a probabilistic concepts (the Poisson distribution function) to determine the actual number of particles to suspend in each cell. The deposition is modelled by an exponential decaying ordinary differential equation. In order to get accurate results from Monte Carlo simulations of sediment transport, a large number of particles is often needed. However, computation time in a particle model increases linearly with the number of particles. Thus, we have developed a high performance particle model for sediment transport by considering three different sediment suspension methods. Parallel simulation experiments are performed in order to investigate the efficiency of these three methods. We conclude that the second method is the best method on distributed computing systems (e.g., a Beowulf cluster), whereas the third maintains the best load distribution. Using variable time stepping to integrate the particle track in this thesis, has also proved to be efficient. Subject Wiener processdispersion coefficientcoloured noise forcesstochastic differential equationlagrangian particle modelpollutionsediment transportparallel processingspeed upload balanceefficiency To reference this document use: http://resolver.tudelft.nl/uuid:43dae97c-431c-4ed3-8064-35686940a32a ISBN 978-90-9021758-1 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2007 Charles, W.M. Files PDF its_charles_20070329.pdf 2.25 MB Close viewer /islandora/object/uuid:43dae97c-431c-4ed3-8064-35686940a32a/datastream/OBJ/view