Results 31 to 40 of about 4,786,029 (258)

Experimental and numerical investigation of flow over spiral grooved cylinders

open access: yesAdvances in Mechanical Engineering, 2022
This study experimentally and numerically investigates the performance of a circular cylinder with a spiral grooved surface in terms of reducing wind drag.
Jun Zhang   +4 more
doaj   +1 more source

Impact of Unsteady Flow Events on Bedload Transport: A Review of Laboratory Experiments

open access: yesWater, 2019
Recent advances in understanding bedload transport under unsteady flow conditions are presented, with a particular emphasis on laboratory experiments.
M. Mrokowska, P. Rowiński
semanticscholar   +1 more source

Experimental research of incipient turbulent flow frequency spectra in hydrodynamic unsteadiness [PDF]

open access: yesINCAS Bulletin, 2021
Hydraulic and heat transfer processes play a very important role in the design and prototyping of aerospace technology. Unsteady conditions are the peculiarity of mostly aerospace systems.
Viacheslav KRAEV
doaj   +1 more source

Macroscopic model for unsteady flow in porous media

open access: yesJournal of Fluid Mechanics, 2019
The present article reports on a formal derivation of a macroscopic model for unsteady one-phase incompressible flow in rigid and periodic porous media using an upscaling technique.
D. Lasseux, F. Valdés-Parada, F. Bellet
semanticscholar   +1 more source

Modeling of a Reduced Hybrid H2–Air Kinetic Scheme Integrating the Effect of Hypersonic Reactive Air with Supersonic Combustion

open access: yesEnergies, 2021
A hybrid H2–air kinetic scheme of 11 species and 15 reactions is developed, which is capable of simulating the high-temperature air reaction flows and H2–O2 combustion flows respectively or simultaneously.
Longfei Li, Jiangfeng Wang
doaj   +1 more source

Aerodynamic Sensitivity Analysis for a Wind Turbine Airfoil in an Air-Particle Two-Phase Flow

open access: yesApplied Sciences, 2019
In this paper, the Navier-Stokes equations coupled with a Lagrangian discrete phase model are described to simulate the air-particle flows over the S809 airfoil of the Phase VI blade, the NH6MW25 airfoil of a 6 MW wind turbine blade and the NACA0012 ...
Tongqing Guo   +4 more
doaj   +1 more source

Small-Time Behavior of Unsteady Cavity Flows [PDF]

open access: yes, 1963
A perturbation theory is applied to investigate the small-time behavior of unsteady cavity flows in which the time-dependent part of the flow may be taken as a small-time expansion superimposed on an established steady cavity flow of an ideal fluid.
Wang, D. P., Wu, T. Yao-tsu
core   +1 more source

Investigation on the Opposing Jet in the Hypersonic Rarefied Flow over a Vehicle Based on the DSMC Method

open access: yesActuators, 2022
In this paper, an opposing jet is applied to the space shuttle arc leading edge and the lifting body cone leading edge in the hypersonic condition of the rarefied flow field.
Yi Shen   +5 more
doaj   +1 more source

A numerical and experimental analysis of flow in a centrifugal pump [PDF]

open access: yes, 2002
Computational fluid dynamics (CFD) analysis has been used to solve the unsteady three-dimensional viscous flow in the entire impeller and volute casing of a centrifugal pump.
Blanco, E.   +4 more
core   +1 more source

Identification of the trade-off between speed and efficiency in undulatory swimming using a bio-inspired robot

open access: yesScientific Reports, 2023
Anguilliform swimmers, like eels or lampreys, are highly efficient swimmers. Key to understanding their performances is the relationship between the body’s kinematics and resulting swimming speed and efficiency.
Alexandros Anastasiadis   +5 more
doaj   +1 more source

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