Hydrodynamic Instabilities

2009 ◽  
Author(s):  
Francois Charru ◽  
Patricia de Forcrand-Millard
Keyword(s):  
Hydrodynamic Instabilities

scholarly journals Determining potential of subcooling to attenuate hydrodynamic instabilities for steam–water two phase flow

2015 ◽  
Vol 84 ◽  
pp. 178-197 ◽  
Author(s):  
Khairuddin Sanaullah ◽  
Afrasyab Khan ◽  
Mohd Sobri Takriff ◽  
Hushairi Zen ◽  
Ajmal Shah ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Hydrodynamic Instabilities ◽  
Two Phase

scholarly journals Influence of hydrodynamic instabilities on the propagation mechanism of fast flames

2015 ◽  
Vol 35 (2) ◽  
pp. 2117-2126 ◽  
Author(s):  
L. Maley ◽  
R. Bhattacharjee ◽  
S.-M. Lau-Chapdelaine ◽  
M.I. Radulescu
Keyword(s):  
Propagation Mechanism ◽  
Hydrodynamic Instabilities

Impact of osmotic pressure on the stability of Taylor vortices

2022 ◽  
Vol 933 ◽  
Author(s):  
Rouae Ben Dhia ◽  
Nils Tilton ◽  
Denis Martinand
Keyword(s):  
Osmotic Pressure ◽  
Critical Conditions ◽  
Hydrodynamic Instabilities ◽  
Taylor Vortices ◽  
Dynamic Filtration ◽  
Analytical Criterion ◽  
Permeable Cylinders ◽  
Couette Cell ◽  
Taylor Couette ◽  
The Stability

We use linear stability analysis and direct numerical simulations to investigate the coupling between centrifugal instabilities, solute transport and osmotic pressure in a Taylor–Couette configuration that models rotating dynamic filtration devices. The geometry consists of a Taylor–Couette cell with a superimposed radial throughflow of solvent across two semi-permeable cylinders. Both cylinders totally reject the solute, inducing the build-up of a concentration boundary layer. The solute retroacts on the velocity field via the osmotic pressure associated with the concentration differences across the semi-permeable cylinders. Our results show that the presence of osmotic pressure strongly alters the dynamics of the centrifugal instabilities and substantially reduces the critical conditions above which Taylor vortices are observed. It is also found that this enhancement of the hydrodynamic instabilities eventually plateaus as the osmotic pressure is further increased. We propose a mechanism to explain how osmosis and instabilities cooperate and develop an analytical criterion to bound the parameter range for which osmosis fosters the hydrodynamic instabilities.

Hydrodynamic Instabilities in Coulomb Fluids

1977 ◽  
Vol 38 (11) ◽  
pp. 599-602
Author(s):  
B. A. Huberman ◽  
W. Streifer
Keyword(s):  
Hydrodynamic Instabilities ◽  
Coulomb Fluids

scholarly journals Thermo-electro-hydrodynamic instabilities in a dielectric liquid under microgravity

2012 ◽  
Vol 81 (2) ◽  
pp. 563-569 ◽  
Author(s):  
Satish V. Malik ◽  
Harunori N. Yoshikawa ◽  
Olivier Crumeyrolle ◽  
Innocent Mutabazi
Keyword(s):  
Dielectric Liquid ◽  
Hydrodynamic Instabilities

scholarly journals Numerical Simulation of Turbulence Flows in Shear Layer

2014 ◽  
Vol 59 (3) ◽  
pp. 1155-1158
Author(s):  
S.V. Fortova
Keyword(s):  
Turbulent Flows ◽  
Shear Layers ◽  
Development Stage ◽  
Inertial Range ◽  
Problem Definition ◽  
Spatial Problem ◽  
Hydrodynamic Instabilities ◽  
Onset Of Turbulence ◽  
Flow Stage ◽  
Vortex Cascade

Abstract For various problems of continuum mechanics described by the equations of hyperbolic type, the comparative analysis of scenarios of development of turbulent flows in shear layers is carried out. It is shown that the development of the hydrodynamic instabilities leads to a vortex cascade that corresponds to the development stage of the vortices in the energy and the inertial range during the transition to the turbulent flow stage. It is proved that for onset of turbulence the spatial problem definition is basic. At the developed stage of turbulence the spectral analysis of kinetic energy is carried out and the Kolmogorov “-5/3” power law is confirmed.

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