Multi-Flow Generalization in Data-Driven Turbulence Modeling: An Exploratory Study

Computational fluid dynamics (CFD) is an important tool in design involving fluid flow. Scale-resolving CFD methods exist, but they are too computationally expensive for practical design. Instead, the relatively cheap Reynolds-averaged Navier-Stokes (RANS) approach is the industry standard, specifically models based on the Boussinesq hypothesis,...

An experimental and numerical investigation of the hydrodynamics of the ducted system of a "Van Rompay Turbine": with the goal to capture energy from the current of an ocean, river, estuary or similar

Hydrokinetic energy is an environmentally friendly source of electricity and it has the advantage to be more predictable compared to other renewables. According to IRENA (2020), the capacity of converting hydrokinetic energy into electricity is expected to increase in the coming decades as many concepts are in the pipeline. One of these...

CFD, sensitivity analysis and optimisation to promote the formation of dunes

In 2017, the ‘Kustpact’, a Dutch national agreement, was signed to develop the Dutch coast without damaging its ecosystem nor its aesthetics. Consequently, the formation and protection of coastal dunes have become a focal point for research and development. For this reason, based on the idea of Performance-Based Design (PBD), this Master thesis...

Passive design guidelines for Philippine housing based on the bahay kubo: Thermal comfort analyses and conceptual implementation of vernacular design strategies

Philippine low-income housing is uncomfortable since it is not built to deal with the hot and humid climate in a passive way. Since local vernacular architecture is known to have a good climatic responsive performance, the aim of this research is to learn how Philippine vernacular design strategies can improve thermal comfort for low-lying, sub...

Keel-Rudder Interaction: A look into the wake of a sailing yacht

In the early 00 of this century, Keuning et al. (2007) looked into the hydrodynamic forces on the rudder and the influence of the hull and keel on these forces. Among others, they have assessed the lift and drag forces on the rudder. One of the outcomes of this study was an asymmetric lift curve; for negative rudder angles the rudder seems to...

Research on lift-carry-over in hull-keel-centre board configurations, to improve the performance prediction of sailing yachts at Dykstra Naval Architects

Dykstra Naval Architects are regularly designing large classic sailing yachts or motor-sailors, of which the draft is an important design restriction.The sailing performance is increased by adding lift-generating appendages,without increasing the draft. An example is a retractable centre board, havinga big influence on the sailing properties....