Results 11 to 20 of about 2,995 (143)

Photospheric magnetic vortex structures [PDF]

, 2011
Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
Shelyag, S., Keenan, Francis, F. P. Keenan, Fedun, V., Mathioudakis, Mihalis, Mathioudakis, M., M. Mathioudakis, Shelyag, Sergiy, Erdélyi, Robert, Keenan, F. P., Erdelyi, R., R. Erdélyi, S. Shelyag, V. Fedun, Fedun, Viktor   +14 more
core   +1 more source

Formation of the leading-edge vortex and spanwise flow on an insect-like flapping-wing throughout a flapping half cycle [PDF]

, 2013
This paper presents an experimental investigation of the evolution of the leading-edge vortex and spanwise flow generated by an insect-like flapping-wing at a Reynolds number relevant to flapping-wing micro air vehicles (FMAVs) (Re = ~15,000 ...
Knowles, Kevin, Phillips, Nathan
core   +1 more source

The flow structure behind vortex generators embedded in a decelerating turbulent boundary layer [PDF]

, 2009
The objective of the present work is to analyse the behaviour of a turbulent decelerating boundary layer under the effect of both passive and active jets vortex generators (VGs).
Braud, Caroline, Godard, Gilles, Cathalifaud, Patricia, Stanislas, Michel   +3 more
core   +1 more source

On the Richtmyer-Meshkov Instability in Magnetohydrodynamics [PDF]

, 2005
The Richtmyer-Meshkov instability is important in a wide variety of applications including inertial confinement fusion and astrophysical phenomena. In some of these applications, the fluids involved may be plasmas and hence be affected by magnetic fields.
Wheatley, Vincent
core   +1 more source

A sufficient condition for a finite-time $L_2 $ singularity of the 3d Euler Equations [PDF]

, 2005
A sufficient condition is derived for a finite-time $L_2 $ singularity of the 3d incompressible Euler equations, making appropriate assumptions on eigenvalues of the Hessian of pressure.
He, Xinyu
core   +1 more source

Experimental investigation of some aspects of insect-like flapping flight aerodynamics for application to micro air vehicles [PDF]

, 2009
Insect-like flapping flight offers a power-efficient and highly manoeuvrable basis for micro air vehicles for indoor applications. Some aspects of the aerodynamics associated with the sweeping phase of insect wing kinematics are examined by making ...
Stabler, G., Wilkins, P. C., Knowles, Kevin, Phillips, Nathan, Zbikowski, Rafal, Ansari, S. A.   +5 more
core   +1 more source

Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause [PDF]

, 2012
The Kelvin-Helmholtz Instability (KHI) can drive waves at the magnetopause. These waves can grow to form rolled-up vortices and facilitate transfer of plasma into the magnetosphere.
C. P. Escoubet, Pu ZY, Borg, A. L., Soucek, J., Y. V. Bogdanova, Bogdanova YV, J. P. Eastwood, Sibeck DG, Shen C, Wang, J., Panov EV, Wang J, M. G. G. T. Taylor, Borg AL, Fazakerley, A. N., J. Berchem, Bogdanova, Y. V., Shen, C., M. W. Dunlop, Lavraud, B., Dunlop, M. W., Phan, T., A. L. Borg, Volwerk, M., H. Laakso, Berchem, J., Wild JA, J. K. Shi, Constantinescu OD, Eastwood JP, J. A. Wild, A. N. Fazakerley, Laakso H, T. Phan, C. Shen, Lavraud B, Taylor, M. G. G. T., Frey, H. U., Sibeck, D. G., Z. Y. Pu, Berchem J, Taylor MGGT, Shi JK, Laakso, H., H. U. Frey, Hasegawa, H., Soucek J, Panov, E. V., Pu, Z. Y., E. V. Panov, Frey HU, Masson, A., Hasegawa H, Phan T, J. Soucek, D. G. Sibeck, Escoubet CP, Dunlop MW, J. Wang, M. Volwerk, Masson A, H. Hasegawa, A. Masson, Wild, J. A., Constantinescu, O. D., O. D. Constantinescu, Volwerk M, Eastwood, J. P., Shi, J. K., Escoubet, C. P., Fazakerley AN, B. Lavraud   +71 more
core   +1 more source

Kinetic helicity and MHD turbulence

, 2000
The issue of dynamical anisotropy in helical three-dimensional magnetohydrodynamic turbulence with a mean magnetic field B₀ is investigated. Using high-resolution direct numerical simulations, we follow the evolution of various isotropic initial states ...
Oughton, Sean, Prandi, Rossella
core   +1 more source

The Creation of a Vortex in Sea water through the MHD [PDF]

, 2018
The Magneto hydrodynamics equations, MHD, are discussed for weakly conductive fluids of electricity, and then an analytical solution is presented. An MHD vortex is generated using seawater in a cylindrical vessel, where external electromagnetic fields ...
Levada, C. L. (Celso), Celso Luis Levada, Missiato, O. (Osvaldo), Levada, A. L. (Alexandre), Osvaldo Missiato, Alexandre Luis Magalhães Levada   +5 more
core   +1 more source

Enhancing hydrogen evolution reaction by harnessing bubble dynamics regulation: Principles, methods, and outlook

Droplet, EarlyView.
Bubble dynamics pose critical bottlenecks to hydrogen evolution reaction efficiency, causing active site isolation, increased ohmic resistance, and concentration overpotential, especially at high current densities. This review comprehensively summarizes passive and active bubble manipulation strategies, elucidates their underlying principles, and ...
Ziwei Guo, Chunhui Zhang, Yunxun Liu, Yi Han, Jinghang Pan, Lingyao Zhang, Chuanqi Nie, Yuejing Zhao, Kesong Liu, Cunming Yu, Lei Jiang   +10 more
wiley   +1 more source