https://doi.org/10.1007/s100510050713
An analysis of the destabilizing curvature effects on the turbulent flow over a rotating cylinder
Département de Physique, Faculté des Sciences de Tunis, 1060 Tunis,
Tunisia
Received:
9
December
1997
Published online: 15 April 1999
An analysis based on the available experimental data and second-order closures is made
for a turbulent shear flow over a rotating cylinder in a quiescent fluid. The near-wall
behaviour of the non-linear model for the pressure-strain correlation proposed by
Speziale, Sarkar and Gatski [J. Fluid Mech. 245, 227 (1991)] is enlarged; and
the methodology proposed by Lai and So [J. Fluid Mech. 221, 641 (1990)] is
adopted to take into account the wall-effects. The radial profile of the curvature
parameter, is examined in connection with the logarithmic law. It is shown that
the log-layer is associated to the region where the mean velocity profile, V, is
related to the power of the radial distance as
Computations reveal
that this region corresponds to the state with the most destabilizing curvature
effects; which can be chararacterized by the minimum value of the parameter
and not that one of the parameter
firstly introduced by Bradshaw [J. Fluid Mech. 36, 171 (1969)]
and extensively used to characterize the turbulence structure in curved flows.
PACS: 47.27.-i – Turbulent flows, convection, and heat transfer / 47.32.-y – Rotational flow and vorticity
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999