Now showing items 1-10 of 31
Aerodynamic analysis of a two-bladed vertical-axis wind turbine using a coupled unsteady RANS and actuator line model
Close-packed contra-rotating vertical-axis turbines have potential advantages in wind and hydrokinetic power generation. This paper describes the development of a numerical model of a vertical axis turbine with a ...
Incompressible SPH simulation of flow past horizontal cylinder between plane wall and free surface
Flow past a circular cylinder located between free-surface and wall boundaries is modelled numerically using non-uniform particle size incompressible smoothed particle hydrodynamics (SPH). Several enhancements including ...
Power extraction by a water turbine in inviscid free surface flow with vertical shear
Hydro-kinetic, tidal stream, and ocean current energy turbines operate in flows subject to vertical shear, which has an influence on the turbines, especially ones located near the bed. The gravity applied on a fluid is ...
Perfluoroalkyl substances in the Yangtze River: Changing exposure and its implications after operation of the Three Gorges Dam.
Potential ecological risk from perfluoroalkyl substances (PFASs) under changing exposure in large river systems has become a new challenge recently. Based on systematic monitoring of PFASs at 43 hydrologic stations along ...
Experimental study of dispersion and modulational instability of surface gravity waves on constant vorticity currents
This paper examines experimentally the dispersion and stability of weakly nonlinear waves on opposing linearly vertically sheared current profiles (with constant vorticity). Measurements are compared against predictions ...
Alternate erosion and deposition in the Yangtze Estuary and the future change
The morphological changing trend of the Yangtze Estuary, the largest estuary of Asia, has become a focus of research in recent years. Based on a long series of topographic data from 1950 to 2015, this paper studied the ...
Steady-state multiple near resonances of periodic interfacial waves with rigid boundary
(AIP Publishing, 2020-08-01)
Piston-Driven Numerical Wave Tank Based on WENO Solver of Well-Balanced Shallow Water Equations
A numerical wave tank equipped with a piston type wave-maker is presented for long-duration simulations of long waves in shallow water. Both wave maker and tank are modelled using the nonlinear shallow water equations, ...
Numerical model of a vertical-axis cross-flow tidal turbine
An array of close-packed contra-rotating cross-flow vertical-axis tidal rotors, a concept developed to maximize the fraction of flow passage swept, has potential advantages for hydrokinetic power generation. To predict the ...