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A. Rashkovan, S.D. Amar, U. Bieder and G. Ziskind
The present paper provides a physically sound numerical modeling of liquid flows experimentally observed inside a vertical circular cylinder with a stationary envelope, rotating bottom and open top. In these flows, the resulting vortex depth may be such ...
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Giovanni Cannata, Marco Tamburrino and Francesco Gallerano
The aim of coastal structures for the defense from erosion is to modify the hydrodynamic fields that would naturally occur with the wave motion, to produce zones of sedimentation of solid material, and to combat the recession of the coastline. T-head gro...
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Dimitris Ntouras and George Papadakis
Modeling free surface flows in a CFD context typically requires an incompressible approach along with a formulation to account for the air?water interface. Commonly, pressure-correction algorithms combined with the Volume of Fluid (VOF) method are used t...
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Rafik Absi
The flow in rivers is turbulent. The main parameter related to turbulence in rivers is the eddy viscosity, which is used to model a turbulent flow and is involved in the determination of both velocities and sediment concentrations. A well-known and large...
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Soumen Maji, Prashanth Reddy Hanmaiahgari, Ram Balachandar, Jaan H. Pu, Ana M. Ricardo and Rui M.L. Ferreira
This review paper addresses the structure of the mean flow and key turbulence quantities in free-surface flows with emergent vegetation. Emergent vegetation in open channel flow affects turbulence, flow patterns, flow resistance, sediment transport, and ...
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Cheng-Yu Ku, Jing-En Xiao and Chih-Yu Liu
In this article, we present a meshless method based on the method of fundamental solutions (MFS) capable of solving free surface flow in three dimensions. Since the basis function of the MFS satisfies the governing equation, the advantage of the MFS is t...
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Francesco Calomino, Giancarlo Alfonsi, Roberto Gaudio, Antonino D?Ippolito, Agostino Lauria, Ali Tafarojnoruz and Serena Artese
A new discharge computational model is proposed on the basis of the integration of the velocity profile across the flow cross-section in an internally corrugated pipe flowing partially full. The model takes into account the velocity profiles in the press...
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Chih-Hua Chang
Transient free-surface deformations and evolving vortices due to the passage of flows over a submerged cavity are simulated. A two-dimensional stream function?vorticity formulation with a free-surface model is employed. Model results are validated agains...
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Date Li, Huaixin Zhang and Guangfei Qin
As a Lagrangian mesh-free method, the moving particle semi-implicit (MPS) method can easily handle complex incompressible flow with a free surface. However, some deficiencies of the MPS method, such as inaccurate results, unphysical pressure oscillation,...
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Haixuan Ye, Yang Chen and Kevin Maki
For numerical simulations of ship and offshore hydrodynamic problems, it is challenging to model the interaction between the free surface and moving complex geometries. This paper proposes a discrete-forcing immersed boundary method (IBM) to efficiently ...
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Javier Fernández-Pato and Pilar García-Navarro
Numerical simulation of mixed flows combining free surface and pressurized flows is a practical tool to prevent possible flood situations in urban environments. When dealing with intense storm events, the limited capacity of the drainage network conduits...
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Momchil Terziev, Guangwei Zhao, Tahsin Tezdogan, Zhiming Yuan and Atilla Incecik
The numerical simulation of ship flows has evolved into a highly practical approach in naval architecture. In typical virtual towing tanks, the principle of Galilean relativity is invoked to maintain the ship as fixed, while the surrounding water is pres...
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Tiecheng Wu, Wanzhen Luo, Dapeng Jiang, Rui Deng and Yulong Li
Particle image velocimetry is applied in this study to measure the wake flow field of a Panamax Bulker ship model under the ballast condition. This investigation revealed that the Froude number is 0.167. The time-averaged velocity, turbulent fluctuations...
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Elena Pummer and Holger Schüttrumpf
Energy storage through hydropower leads to free surface water waves in the connected reservoirs. The reason for this is the movement of water between reservoirs at different elevations, which is necessary for electrical energy storage. Currently, the exp...
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Alexander Khrabry, Evgueni Smirnov, Dmitry Zaytsev, Valery Goryachev
Pág. 159 - 166
Dam-break turbulent flow interacting with obstacles is simulated with the VOF method implemented in an in-house unstructured-grid finite-volume Navier-Stokes code. A special attention is paid to prediction of separation phenomena using low-Re computation...
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Gorazd Novak, Angelantonio Tafuni, José M. Domínguez, Matja? Cetina and Du?an ?agar
Fishways have a great ecological importance as they help mitigate the interruptions of fish migration routes. In the present work, the novel DualSPHysics v4.4 solver, based on the smoothed particle hydrodynamics method (SPH), has been applied to perform ...
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Joffrey Jamain, Julien Touboul, Vincent Rey and Kostas Belibassakis
There is growing interest for water-wave flows through arrangements of cylinders with application to the performance of porous marine structures and environmental flows in coastal vegetation. For specific few cases experimental data are available in the ...
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Stefano Putzu, Francesco Enrile, Giovanni Besio, Andrea Cucco, Laura Cutroneo, Marco Capello and Alessandro Stocchino
Useful information, such as water levels, currents, salinity and temperature dynamics in water bodies, are obtained through numerical models in order to pursue scientific research or consultancy. Model validation dates back long ago, since such models st...
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Diana De Padova, Michele Mossa, Stefano Sibilla
Pág. 1 - 25
This paper shows the results of the numerical modelling of the transition from supercritical to subcritical flow at an abrupt drop, which can be characterised by the occurrence of oscillatory flow conditions between two different jump types. Weakly-Compr...
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Xing Zheng, Qingwei Ma, Songdong Shao and Abbas Khayyer
The Smoothed Particle Hydrodynamics (SPH) method has proven to have great potential in dealing with the wave?structure interactions since it can deal with the large amplitude and breaking waves and easily captures the free surface. The paper will adopt a...
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