Browsing by Author Cuong T. Nguyen
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In this study, the solidification process of a compound droplet is numerically simulated by an axisymmetric front-tracking/finite difference technique. The compound droplet placed on a cold flat surface in a gas environment consists of an inner gas core surrounded by a concentric shell phase-change liquid that forms an outer droplet. The initial droplet shape assumed as a spherical cap is therefore determined by two wetting angles known as the inner wetting angle (?0i for the inner core) and the outer wetting angle (?0o for the outer droplet). During the solidification process, there is the presence of two three-junction points where a prescribed growth angle ? is specified. We analyz... |
We investigate the impact dynamics of a single wet agglomerate composed of primary spherical particles impacting a flat plane by using three-dimensional discrete element method simulations. The primary particle is assumed to be rigid and interacted with its near-neighboring particles by introducing approximate analytical expressions of capillary cohesion forces and lubrication forces induced from the liquid in addition to their elastic and frictional interactions. The paper analyzes the mechanical strength, the deformation, and the connectivity of wet particle agglomerate during the impact as well as in its early-stage impact and the final-stage deposition. We show that the mechanical... |
Sustainability requires that once reservoirs are built, they should be managed as environmentally friendly as possible. If the management policy does not achieve efficiency, there might be a man-made disaster occurred. There is a need for establishing a national strategy for developing hydrological forecasting techniques. In this study, hydrological models MARINE and SWAT were established for the Ban-Chat reservoir basin by testing performance in simulating hourly inflow during flood season for short term forecast and daily inflow for long term management respectively. Both models are set up using the same available database but they differ in terms of spatial discretization, infiltra... |
