Results 21 to 30 of about 147,583 (292)

Investigation of the Impact of Ducted Propellers on AUV Hydrodynamic Performance Based on CFD

Kongzhi Yu Xinxi Jishu, 2023
Autonomous underwater vehicle (AUV) equipped with ducted propellers exhibit increased maneuverability. However, ducting also influences the AUV's dynamic characteristics. Accordingly, it is crucial to analyze the effect that ducted propellers exert on an
GUAN Yingjie, CUI Qingjia, XU Biao, BIAN Yougang, QIN Xiaohui   +4 more
doaj   +3 more sources

On the behavior of nonlinear hydrodynamic coefficients of a submerged cylinder beneath the water surface

Vietnam Journal of Mechanics, 2021
This study aims at numerically exploring the behavior of flow fields and nonlinear hydrodynamic coefficients of a horizontal cylinder beneath the free surface flow considering the effects of nonlinear surface waves and various cylinder shapes.
Nguyen Van My, Le Anh Tien, Phan Hoang Nam, Nguyen Quoc Khanh, Chau Van Than, Phan Thanh Hoang   +5 more
doaj   +1 more source

Chiral hydrodynamics in strong external magnetic fields

Journal of High Energy Physics, 2021
We construct the general hydrodynamic description of (3+1)-dimensional chiral charged (quantum) fluids subject to a strong external magnetic field with effective field theory methods. We determine the constitutive equations for the energy-momentum tensor
Martin Ammon, Sebastian Grieninger, Juan Hernandez, Matthias Kaminski, Roshan Koirala, Julian Leiber, Jackson Wu   +6 more
doaj   +1 more source

Hydrodynamics of driven granular gases [PDF]

, 2003
Hydrodynamic equations for granular gases driven by the Fokker-Planck operator are derived. Transport coefficients appeared in Navier-Stokes order change from the values of a free cooling state to those of a steady state.Comment: 5 pages, 3 ...
A. Goldstein, A. Santos, A. Santos, F. Gerl, G. Kuwabara, H. Hayakawa, H. Kuninaka, H.-D. Kim, Hisao Hayakawa, J.A. Carrillo, J.J. Brey, J.M. Montanero, K. Ichiki, L. Labous, N.V. Brilliantov, N.V. Brilliantov, N.V. Brilliantov, R. Pagnani, T. Biben, T. Kawaguchi, T. Kawaguchi, T.P.J. van Noije, V. Garzo, W.A.M. Morgado   +23 more
core   +2 more sources

Assessment of the Manoeuvrability Characteristics of a Twin Shaft Naval Vessel Using an Open-Source CFD Code

Journal of Marine Science and Engineering, 2021
The purpose of this study is to assess the quality of the manoeuvre prediction of a twin-shaft naval vessel by means of a time-domain simulator based on Computational Fluid Dynamics (CFD) hydrodynamic coefficients.
Andrea Franceschi, Benedetto Piaggio, Roberto Tonelli, Diego Villa, Michele Viviani   +4 more
doaj   +1 more source

Hydrodynamics Model Identification and Model-Based Control Application of a New Type of AUV

Journal of Marine Science and Engineering
The hydrodynamic coefficients of underwater robots can be used to evaluate their maneuverability and motion stability and to design motion controllers, thereby reducing experimental time and costs.
Lunyang Lin, Yuxiang Chen, Hong Xiong, Chunliang Yu, Hong Zhu, Yiyang Xing, Guodong Zheng   +6 more
doaj   +1 more source

Effect of surfactants on liquid side mass transfer coefficients: a new insight [PDF]

, 2009
Specific experiments are proposed to investigate the effect of surfactants on liquid side mass transfer coefficients. They are based on the determination of the liquid side mass transfer coefficient kL at a free gas-liquid interface, under controlled ...
Hebrard, Gilles, Loubière, Karine, Zeng, Jikun   +2 more
core   +2 more sources

Hydrodynamics and transport coefficients for dilute granular gases [PDF]

Physical Review E, 2003
The hydrodynamics of granular gases of viscoelastic particles, whose collision is described by an impact-velocity dependent coefficient of restitution, which is developed using the Chapman-Enskog approach. We derive the hydrodynamic equations and the according transport coefficients with the assumption that the shape of the velocity distribution ...
Brilliantov, Nicolai V., Pöschel, Thorsten   +1 more
openaire   +3 more sources

Linearized Boltzmann Equation and Hydrodynamics for Granular Gases

, 2003
The linearized Boltzmann equation is considered to describe small spatial perturbations of the homogeneous cooling state. The corresponding macroscopic balance equations for the density, temperature, and flow velocity are derived from it as the basis for
Brey, J. Javier, Dufty, James W., Ruiz-Montero, M. J.   +2 more
core   +1 more source

Hydrodynamic coefficients and forces on multihulls in shallow water with constant or variable depth [PDF]

Transport, 2008
Numerical and hydro dynamical procedures are developed to compute bidimensional hydrodynamic coefficients and forces on multihulls associated with harmonic oscillations in shallow water with constant or variable depth.
Noureddine Dabssi, Mohamed Chagdali, Alain Hémon   +2 more
doaj   +1 more source