Turbulent spot growth in plane Couette flow: statistical study and formation of spanwise vorticity
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Publication:5411141
DOI10.1088/0169-5983/46/1/015512zbMATH Open1433.76056arXiv1401.3586OpenAlexW3104283398MaRDI QIDQ5411141
Publication date: 22 April 2014
Published in: (Search for Journal in Brave)
Abstract: This article presents direct numerical simulations of the growth of turbulent spots in the transitional regime of plane Couette flow. A quantitative description of the growth process and of the detail of the quadrupolar flow around the spot is given. Focus is put on formation of spanwise vorticity in the velocity streaks that resembles a secondary shear instability. The main features of the instability (coherence lengths, advection velocity) are studied in the context of the turbulent spot, below and above the threshold Reynolds number of appearance of the oblique turbulent bands of plane Couette flow.
Full work available at URL: https://arxiv.org/abs/1401.3586
Statistical turbulence modeling (76F55) Shear flows and turbulence (76F10) Direct numerical and large eddy simulation of turbulence (76F65) Parallel shear flows in hydrodynamic stability (76E05)
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