Results 21 to 30 of about 20,748 (263)

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

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

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

Hydrodynamic analysis of the surface-piercing propeller in unsteady open water condition using boundary element method

International Journal of Naval Architecture and Ocean Engineering, 2016
This article investigates numerical modeling of surface piercing propeller (SPP) in unsteady open water condition using boundary element method.
Ehsan Yari, Hassan Ghassemi
doaj   +1 more source

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

Hydrodynamic Coefficients of Simplified Subsea Structures [PDF]

Volume 1: Offshore Technology, 2018
Simplified two-dimensional models, representing components of complex subsea structures, are experimentally investigated. Individual as well as combinations of components in different configurations are tested, in order to study the effect of hydrodynamic interaction.
Mentzoni, Fredrik, Abrahamsen-Prsic, Mia, Kristiansen, Trygve   +2 more
openaire   +2 more sources

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

FEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey, Miriam Livier Llamas‐García, Gabriela M. Montero‐Morán, Leticia Santos, Samuel Lara‐González   +4 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +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