Lattice Boltzmann equation simulation of rectangular jet (AR=1.5) instability and axis-switching Academic Article

abstract

• We investigate the axis-switching and instability onset characteristics of a rectangular jet with aspect ratio (AR) of 1.5. Jet flow simulations of four different Reynolds numbers, 10,100,150, and 200, are performed. Half-width of streamwise velocity along with velocity vector and streamwise vorticity on transverse planes at different downstream locations are examined. The simulation results show the following instability characteristics: (i) At relatively low Reynolds numbers (10 and 100), the jet flow is laminar and stable; (ii) At Re=150, the flow is still laminar and stable but axis-switching occurs with downstream distance; and (iii) At Re=200, the jet flow becomes unstable but the axis-switching is still seen roughly. Instability first originates near the jet orifice and then propagates down the stream. 2005 Elsevier B.V. All rights reserved.

authors

• Girimaji, Sharath

published proceedings

• PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS

author list (cited authors)

• Yu, H. D., & Girimaji, S. S.

citation count

• 10

complete list of authors

• Yu, HD||Girimaji, SS

publication date

• March 2006

publisher

• Elsevier  Publisher

published in

• Physica A: Statistical Mechanics and its Applications  Journal

keywords

• Axis-switching
• Instability
• Lattice Boltzmann Equation
• Rectangular Jet

Digital Object Identifier (DOI)

• 10.1016/j.physa.2005.09.035

start page

• 151

end page

• 157

volume

• 362

issue

• 1

URL

• http://dx.doi.org/10.1016/j.physa.2005.09.035