RT Journal Article
SR 00
ID 10.1017/S002211201100022X
A1 González Gutierrez, Leo Miguel
A1 Kuhnen, J.
A1 Theofilis, Vassilios
A1 Kuhlmann, H. C.
T1 Three-dimensional flow instability in a lid-driven isosceles triangular cavity
JF Journal of Fluid Mechanics
YR 2011
FD 2011-05
VO 675
SP 369
OP 396
K1 instability; transition to turbulence
AB Linear three-dimensional modal instability of steady laminar two-dimensional states developing in a lid-driven cavity of isosceles triangular cross-section is investigated theoretically and experimentally for the case in which the equal sides form a rectangular corner. An asymmetric steady two-dimensional motion is driven by the steady motion of one of the equal sides. If the side moves away from the rectangular corner, a stationary three-dimensional instability is found. If the motion is directed towards the corner, the instability is oscillatory. The respective critical Reynolds numbers are identified both theoretically and experimentally. The neutral curves pertinent to the two configurations and the properties of the respective leading eigenmodes are documented and analogies to instabilities in rectangular lid-driven cavities are discussed.
PB Cambridge University Press
SN 0022-1120
LK http://oa.upm.es/12112/