The first flow visualization experimental results of transition in plane Couette flow are reported. The Couette flow water channel was of an infinite-belt type with counter-moving walls. The belt and channel walls were transparent making it possible to visualize the flow pattern in the streamwise-spanwise plane by utilizing fluid-suspended reflective flakes. Transition was triggered by a high-amplitude pointwise disturbance. The transitional Reynolds number, i.e. the lowest Reynolds number for which turbulence can be sustained, was determined to be 360 ± 10, based on half-channel height and half the velocity difference between the walls. For Reynolds numbers above this value a large enough amplitude of the initial disturbance gave rise to a growing turbulent spot. Its shape and spreading rate was determined for Reynolds numbers up to 1000.
%0 Journal Article
%1 tillmark1992experiments
%A Tillmark, Nils
%A Alfredsson, P. Henrik
%B Journal of Fluid Mechanics
%D 1992
%I Cambridge University Press
%K 76-05-fluid-mechanics-experimental-work 76f06-transition-to-turbulence 76f10-turbulent-shear-flows
%P 89–102
%R 10.1017/S0022112092001046
%T Experiments on transition in plane Couette flow
%U https://www.cambridge.org/core/article/experiments-on-transition-in-plane-couette-flow/4422C549D94ADB8E9BB051EC57FB1EFD
%V 235
%X The first flow visualization experimental results of transition in plane Couette flow are reported. The Couette flow water channel was of an infinite-belt type with counter-moving walls. The belt and channel walls were transparent making it possible to visualize the flow pattern in the streamwise-spanwise plane by utilizing fluid-suspended reflective flakes. Transition was triggered by a high-amplitude pointwise disturbance. The transitional Reynolds number, i.e. the lowest Reynolds number for which turbulence can be sustained, was determined to be 360 ± 10, based on half-channel height and half the velocity difference between the walls. For Reynolds numbers above this value a large enough amplitude of the initial disturbance gave rise to a growing turbulent spot. Its shape and spreading rate was determined for Reynolds numbers up to 1000.
@article{tillmark1992experiments,
abstract = {The first flow visualization experimental results of transition in plane Couette flow are reported. The Couette flow water channel was of an infinite-belt type with counter-moving walls. The belt and channel walls were transparent making it possible to visualize the flow pattern in the streamwise-spanwise plane by utilizing fluid-suspended reflective flakes. Transition was triggered by a high-amplitude pointwise disturbance. The transitional Reynolds number, i.e. the lowest Reynolds number for which turbulence can be sustained, was determined to be 360 ± 10, based on half-channel height and half the velocity difference between the walls. For Reynolds numbers above this value a large enough amplitude of the initial disturbance gave rise to a growing turbulent spot. Its shape and spreading rate was determined for Reynolds numbers up to 1000.},
added-at = {2019-10-15T01:31:39.000+0200},
author = {Tillmark, Nils and Alfredsson, P. Henrik},
biburl = {https://www.bibsonomy.org/bibtex/20fef08c5c2f163d63b0dec45968cd195/gdmcbain},
booktitle = {Journal of Fluid Mechanics},
doi = {10.1017/S0022112092001046},
interhash = {ce152134b2a89b88417105f1e66d4ae7},
intrahash = {0fef08c5c2f163d63b0dec45968cd195},
issn = {00221120},
keywords = {76-05-fluid-mechanics-experimental-work 76f06-transition-to-turbulence 76f10-turbulent-shear-flows},
pages = {89–102},
publisher = {Cambridge University Press},
timestamp = {2019-10-15T01:31:57.000+0200},
title = {Experiments on transition in plane Couette flow},
url = {https://www.cambridge.org/core/article/experiments-on-transition-in-plane-couette-flow/4422C549D94ADB8E9BB051EC57FB1EFD},
volume = 235,
year = 1992
}