Jean-Michel Hervouet and Jacek A. Jankowski
Abstract. The numerical solutions of three-dimensional, non-hydrostatic Navier-Stokes equations are compared to the ones obtained with Boussinesq equations in the case of a solitary wave in a rectangular channel. Continue reading
Holger Weilbeer, Jacek A. Jankowski and Werner Zielke
Abstract. The theoretical background of a new finite-element non-hydrostatic model for simulation of free surface flows based on the fractional step method and pressure decomposition is presented. Continue reading
J.A. Jankowski and W. Zielke
Abstract The paper critically reviews the presently available experimental data from various tests and experiments connected with the deep-sea mining issue with regard to their feasibility in supporting and validating the developed numerical models. Numerical modelling is applied mainly to predetermining the plume development and seafloor blanketing caused by various sediment discharges. Continue reading
W.Zielke and J.A. Jankowski, J. Sündermann and J. Segschneider
Abstract. The paper describes the application of mesoscale and large scale models in order to simulate the impact of deep-sea mining sediment discharges on the marine environment. The modelling efforts are cross-linked with the experiments of the TUSCH research group which provide supporting data. The results yield time-dependent, three-dimensional concentration fields, the amount of redeposition and the plume residence time. The near bed emissions impact mainly at a local scale, whereas more widespread contamination due to discharges at the free surface or in some intermediate depth cannot be excluded. Continue reading
J.A. Jankowski, A. Malcherek and W. Zielke
Abstract. A numerical model was developed in order to estimate the residence time of a sediment plume generated by deep-sea mining activities. The model is capable of simulating density currents in a sediment-laden ocean bottom boundary layer. The numerical model was verified using an analytical solution, which does not take into account the above mentioned effects. The results show that due to density differences the residence time of a plume is reduced substantially. Continue reading