Results 91 to 100 of about 126,359 (234)

Numerical study of nonlinearity of unsteady aerodynamics for NLR7301 profile [PDF]

, 2005
Details of unsteady aerodynamics for a two dimensional NLR7301 airfoil with flap were numerically investigated by a Navier-Stokes code in the transonic regime. Unsteady aerodynamic coefficients such as lift and pitching moment show nonlinear aspects in a
Saitoh, Kenichi, Kheirandish, Hamidreza, Voß, Ralph   +2 more
core  

Immersed Boundary Projection Method for Boundaries With Slip Velocities

International Journal for Numerical Methods in Fluids, EarlyView.
A formulation of the immersed boundary method for incompressible flow over arbitrarily‐shaped bodies with surface slip described by the Navier boundary condition is presented. The wall slip velocity and the boundary force are determined implicitly through a projection to satisfy both the boundary condition and the divergence‐free condition of the ...
Takehiro Fujii, Takeshi Omori
wiley   +1 more source

Challenges in modeling the unsteady aerodynamics of wind turbines

2002 ASME Wind Energy Symposium, 2002
Many of the aerodynamic phenomena contributing to the observed effects on wind turbines are now known, but the details of the flow are still poorly understood and are challenging to predict accurately, issues discussed herein include the modeling of the induced velocity field produced by the vortical wake behind the turbine, the various unsteady ...
openaire   +1 more source

On the Variability of Results for Cylinder Flow: A Systematic Analysis of Parameter Sensitivity Within the Lattice Boltzmann Method

International Journal for Numerical Methods in Fluids, EarlyView.
This study systematically investigates the variability of cylinder flow results. We provide a comprehensive overview of literature values and, using the lattice Boltzmann method (LBM), show that insufficient convergence studies and variations in simulation parameters are a plausible cause for the significant spread in data.
Maximilian Bille, Mario C. Bedrunka, Philipp Spelten, Holger Foysi, Dirk Reith   +4 more
wiley   +1 more source

High‐Order Projection‐Based Upwind Method for Simulation of Transitional Turbulent Flows

International Journal for Numerical Methods in Fluids, EarlyView.
In this study, we evaluated the implicit large‐eddy simulation capabilities of the mass‐conserving mixed stress method for transitional turbulent flows and proposed an efficient solution method for large‐scale applications. The results presented in this work show promising outcomes for incompressible aerodynamic flow problems, which can be further ...
Philip L. Lederer, Xaver Mooslechner, Joachim Schöberl   +2 more
wiley   +1 more source

Carbon isotope geochemistry of organic matter in volcanic paleosols constrains paleo‐environmental variations

Journal of Quaternary Science, EarlyView.
ABSTRACT The Fiorano quarry paleosol developed within the Colli Albani volcanic district (Italy) in the time interval bracketed by the deposition of the Pozzolanelle pyroclastic‐flow unit (365 ± 4 ka) and the emplacement of the Capo di Bove lava flow (277 ± 2 ka).
Eduardo Di Marcantonio, Luca Aldega, Luigi Dallai, Mario Gaeta, Fabrizio Marra   +4 more
wiley   +1 more source

Efficient Prediction of Unsteady Aerodynamic Characteristics Based on Kriging Model for Flexible Variable-Sweep Wings

Aerospace
Numerical simulations employing the dynamic mesh method were performed to investigate the unsteady aerodynamics of variable-sweep wings during morphing. Quasi-steady and unsteady aerodynamic characteristics were compared, and the effects of key operating
Xiaochen Hang, Jincheng Liu, Rui Zhu, Yanxin Huang   +3 more
doaj   +1 more source

Digital Printing of Photoreversible Protective Films

Macromolecular Rapid Communications, EarlyView.
A photopolymerized and photoreversible temporary protective film based on an ortho‐nitrobenzyl crosslinker is presented that can be applied using aerosol jet printing. To improve adhesion to industry‐relevant surfaces, a polyethyleneimine‐based adhesion promoter was added to the aqueous formulation of diacrylate cross‐linker and acrylated macromers ...
Morris Wolf, Alper Balkan, René Schneider, Stefan Mommer, Yves Leterrier, Mark W. Tibbitt   +5 more
wiley   +1 more source

Numerical Study on High-Speed Icebreaking of a Hemispherically Capped Cylinder Based on the Smoothed Particle Hydrodynamics Method

Journal of Marine Science and Engineering
This work develops an Updated Lagrangian Smoothed Particle Hydrodynamics (ULSPH) framework to simulate high-speed icebreaking by a hemispherically capped cylinder (HCC).
Xiaowei Cai, Zhenwang Li, Jun Zhang, Jie Zhao, Yanmei Jiao   +4 more
doaj   +1 more source

Staged Bilateral Magnetic Resonance‐Guided Focused Ultrasound for Treating Essential Tremor: Systematic Review and Meta‐Analysis

Movement Disorders Clinical Practice, EarlyView.
Abstract Background Unilateral magnetic resonance guided focused ultrasound (MRgFUS) thalamotomy reduces tremor in essential tremor, yet disability often persists on the untreated side. The added benefit and safety of a staged contralateral lesion remain uncertain.
Nima Norbu Sherpa, Andrea Gonzalez Lezana, Gabriela Prilip, Kenji Fukutome, Nathan J. Pertsch, Ruth Reeve, Nadège Bault, Elsa Fouragnan   +7 more
wiley   +1 more source