The following progress was made on the basis of research conducted by WL / Delft Hydraulics: The geotechnical static consolidation phenomenon was introduced into the fluid mechanics of high concentration solid-liquid mixtures (clogging problems). Potential applications which come to mind include problems resulting from clogging within the food industry (such as carrot transports, potato peels), sanitary system sludge, transportation of fluidised excavated soil. A publication describing this study was prepared.
In 2004 our first publication on concentrated slurries in Trenchless Technology by an international journal specialised in Tunnelling (TUST) saw the light of day.
In 2004 a publication followed on the fluid mechanics of solids transport by Non-Newtonian fluids. Data and video material obtained in Carrousel experiments dating back several years was brought to the attention of international experts. Specifically the existence of gelled bottom layers in pipes and bore holes which provide an important means of solids transport was highly appreciated. WL / Delft Hydraulics' data on the settling of solids being transported by Non-Newtonian fluids was also brought to the attention of the international scientific community (presentation at T&S conference). It was well-received and enjoyed a surprising broad based support.
The year 2004 saw the publication of WL / Delft Hydraulics' conclusions regarding the cause of unsteady sand transport in long distance dredging pipelines presented before the international dredging community (WODCON congress).
Density Stratification Effects in turbulent pipe flow have been modelled with 1-D theory and validated with laboratory experiments. The conclusion is that in two-phase flows stratification effects might be stronger under field conditions than under those created in the laboratory. |
