... is a very common phenomenon when a ship sailing in the open sea. The breaking bow waves are very complicated which include water overturning, plunging, water droplets, air entrainment, etc. In addition, the breaking phenomenon can be significantly changed when the ship is moving with different speeds...

... Abstract High-fidelity simulations of plunging breaking waves are performed through direct numerical simulations of the two-phase air-water flow. We investigate how air is entrained during plunging breaking waves in the present study. It is responsible for the formation of numerous bubbles...

... ABSTRACT The prediction of wastewater movement, which is in the form of jet, is of great importance for the design of wastewater discharge project. A novel integral model is developed for the jet discharged into wave and tidal current environment. In the model, an entrainment closure approach...

...Direct Numerical Simulations of Air Entrainment Induced by Vortex Structures Shangyu Yua, Dick Yueb, Lei Wanga, Xiangming Yub aState Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University,Shanghai, China bDepartment of Ocean Engineering, Massachusetts Institute of Technology, Cambridge...

... for offshore gas wells to calculate critical gas flow rate on the basis of condition at the separator without considering the different temperature and pressure distribution between onshore and offshore gas wells. dangerous position droplet entrainment flow metering diameter prediction droplet...

...Numerical Study of Air Entrainment and Bubble Plume Dynamics under Breaking Waves Lian Tang, Onyx W.H Wai Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong ABSTRACT In this study, an air entrainment model based on the turbulence production...

... ABSTRACT In this paper lock-release density currents moving on flat and upsloping beds are investigated by laboratory experiments and numerical simulations. Numerical simulations were carried out by a two-layer shallow-water model, testing two different entrainment relations: a modified form...

... with the Gaussian assumptions on vertical and horizontal quantities of the excess velocity and the concentration for near field. In which entrainment coefficients are adopted to simulate the mixing mechanism for turbulent closure through the entrainment functions. Next, a far field model is developed by using...

... of entrainment because the frame of reference is attached on the underwater vehicle. Compared with a moving boundary method, the method presented need not to reconstruct meshes, and can simulate wind/water tunnel tests and rotating arm tank tests at less efforts. The computational results for a flat type...

... of discharged water to protect the surrounding ecosystem and the environment. For the reasons described above, such flows have been extensively studied. Turner (1986) surveyed many different kinds of entraining flow such as buoyant jet and plume, and showed that entrainment assumption is useful in diverse...

... (1986), Dermissis (1990), Grubert (1989) and Foo et al (1995). From these experiments a number of dimensionless parameters which influence the mixing processes and entrainment rates have been found. There is little agreement on the actual equations to describe the rate of entrainment. Considerable...

...Proceedings of the Third (1993) International Offshore and Polar Engineering Conference Singapore, 6·11 June 1993 Copyright © 1993 by The International Society of Offshore and Polar Engineers ISBN 1·880653·05·2 (Set); ISBN 1·880653·07·9 (Vol II) Gas Entrainment in Liquid Slugs 0.1. Nydal Institute...