Abstract This paper presents a numerical simulation of the steady propulsion state manta rays and investigates influence single motion parameters addition perturbation signals on hydrodynamic characteristics vortex evolution rays. A model equations ray were established by observing living organisms, then computational method combining immersed boundary (IBM) Sphere function-based Gas Kinetic Sc...

An oil spill model coupled with a hydrodynamic model was developed to simulate the spread of oil slick in real marine conditions considering the effects of tidal currents, wind and wave. The hydrodynamic model is verified using the measurements of tidal elevations and current speeds at the Persian Gulf. Effect of various governing factors on oil slick movement, tidal currents, wind and wave, ar...

Extensive experimental investigations of hydrofoil-assisted catamarans have identified the main hydrodynamic parameters affecting the performance of these vessels. Design principles of existing vessels are discussed in the light of these hydrodynamic findings. The experience gained from experimental testing has provided the basis for the development of a non-linear vortex lattice method for des...

As the most mature trend energy capture device in current technology, hydrodynamic performance of horizontal axis turbine is related to conversion entire flow energy. Based on CFD simulation software, this paper compares influence different TSRs impeller utilization and studies plus deflector hydrodynamics. Studies have shown that when TSR increases, also gradually rate adding a shroud much gre...