Results 51 to 60 of about 24,495 (263)

Unsteady Hydrodynamic Analysis and Experimental Methodology for Voith Schneider Propeller

Journal of Marine Science and Engineering
The Voith Schneider Propeller (VSP) operates with blades undergoing an approximately sinusoidal periodic motion along a circular path. Hydrodynamically, the continuous significant variation in the angle of attack between the blades and incoming flow ...
Wentao Liu, Zhihua Liu, Weixin Xue, Qian Chen   +3 more
doaj   +1 more source

On the Hydrodynamic Limit of the Enskog Equation

Publications of the Research Institute for Mathematical Sciences, 1998
The Enskog equation in the hydrodynamie limit is investigated. If the Knudsen number ε and the scale of diameter a of the hard sphere particles are of the same order,
openaire   +2 more sources

Stationary Solutions to the Boltzmann Equation in the Hydrodynamic Limit [PDF]

Annals of PDE, 2017
Despite its conceptual and practical importance, the rigorous derivation of the steady incompressible Navier-Stokes-Fourier system from the Boltzmann theory has been {an} outstanding {open problem} for general domains in 3D. We settle this open question in {the} affirmative, in the presence of a small external field and a small boundary temperature ...
Raffaele Esposito, Yan Guo, Chanwoo Kim, Rossana Marra   +3 more
openaire   +4 more sources

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

Enhancing Bubble Removal in Geometry‐Optimized Electrodes

Advanced Engineering Materials, EarlyView.
3D‐printed lattice electrodes outperform stochastic foams in alkaline water electrolysis despite 20%–25% lower surface area. Straight flow channels generate Venturi‐like bubble entrainment, suppressing gas accumulation that renders foam interiors electrochemically inactive.
Florian Wiesner, Peter Förster, Alexander Limper, Anselm Brodersen, Matthias Wessling, John Linkhorst   +5 more
wiley   +1 more source

Nondetections of Helium in the Young Sub-Jovian Planets K2-100b, HD 63433b, and V1298 Tau c

The Astronomical Journal
We search for excess in-transit absorption of neutral helium at 1.083 μ m in the atmospheres of the young (
Munazza K. Alam, James Kirk, Leonardo A. Dos Santos, Patrick McCreery, Andrew P. Allan, James E. Owen, Aline A. Vidotto, Romain Allart, Vincent Bourrier, Néstor Espinoza, George W. King, Mercedes López-Morales, Julia V. Seidel   +12 more
doaj   +1 more source

Design and Implementation of an Underwater Cleaning System for Ship Maintenance via a Robotic Arm

Applied Sciences
To better address the operational requirements for emergency underwater ship maintenance, this study proposes the use of an underwater robotic arm instead of divers for cleaning submerged hull sections. Experimental analyses are conducted to validate the
Chenghao Cao, Wenyong Guo, Jingzhou Fu, Jianggui Han, Xiaofeng Li   +4 more
doaj   +1 more source

Encounter rates between bacteria and small sinking particles

New Journal of Physics, 2020
The ecological interaction between bacteria and sinking particles, such as bacterial degradation of marine snow particles, is regulated by their encounters.
Jonasz Słomka, Uria Alcolombri, Eleonora Secchi, Roman Stocker, Vicente I Fernandez   +4 more
doaj   +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

Investigation on Hydrodynamic Performance and Wall Temperature of Water-Cooled Wall in 1000 MW Boiler Under Low-Load Conditions

Energies
To enhance the peak-shaving capability of a boiler, a mathematical model of hydrodynamic and wall temperature characteristics for the water-cooled wall of a 1000 MW boiler was established.
Peian Chong, Xiaolei Zhu, Jianning Li, Xiao Li, Lei Deng   +4 more
doaj   +1 more source