نتایج جستجو برای: hydrodynamic instability

تعداد نتایج: 113359  

2014
By T. Yu J. Park H. Moon J. Shim D. You D. Kim A. Ovsyannikov

Jet-wiping is a hydrodynamic method for controlling the liquid film thickness in a coating process. In industrial conditions, the jet is generally turbulent. When the jet wipes a liquid film, it usually induces violent film instability called splashing. The instability is characterized by the ejection of droplets from the runback flow. Consequently, it can degrade the final coating quality sinc...

2002
R. Aditi Simha Sriram Ramaswamy

General principles of symmetry and conservation are used to construct the hydrodynamic equations for orientationally ordered suspensions of self-propelled particles (SPPs). Without knowledge of the microscopic origins of the ordering or the mechanisms of self-propulsion, we are able to make a number of striking, testable predictions for the properties of these nonequilibrium phases of matter. T...

Journal: :Physical review letters 2005
Efi Efrati Eli Livne Baruch Meerson

We employ hydrodynamic equations to follow the clustering instability of a freely cooling dilute gas of inelastically colliding spheres into a well-developed nonlinear regime. We simplify the problem by dealing with a one-dimensional coarse-grained flow. We observe that at a late stage of the instability the shear stress becomes negligibly small, and the gas flows solely by inertia. As a result...

Journal: :Physical review letters 2012
L Gao P M Nilson I V Igumenschev S X Hu J R Davies C Stoeckl M G Haines D H Froula R Betti D D Meyerhofer

Magnetic fields generated by the Rayleigh-Taylor instability were measured in laser-accelerated planar foils using ultrafast proton radiography. Thin plastic foils were irradiated with ∼4-kJ, 2.5-ns laser pulses focused to an intensity of ∼10(14)  W/cm(2) on the OMEGA EP Laser System. Target modulations were seeded by laser nonuniformities and amplified during target acceleration by the Rayleig...

2017
David Cébron Rainer Hollerbach D. Cébron R. Hollerbach

Large-scale planetary or stellar magnetic fields generated by a dynamo effect are mostly attributed to flows forced by buoyancy forces in electrically conducting fluid layers. However, these large-scale fields may also be controlled by tides, as previously suggested for the star τ -boo, Mars or the Early Moon. By simulating a small local patch of a rotating fluid, Barker & Lithwick (2014) have ...

2015
Philip S. Marcus Suyang Pei Chung-Hsiang Jiang Joseph A. Barranco Pedram Hassanzadeh Daniel Lecoanet

There is considerable interest in hydrodynamic instabilities in dead zones of protoplanetary disks as a mechanism for driving angular momentum transport and as a source of particle-trapping vortices to mix chondrules and incubate planetesimal formation. We present simulations with a pseudo-spectral anelastic code and with the compressible code Athena, showing that stably stratified flows in a s...

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