TITLE:
Effects of Rotation on Turbulence Production
AUTHORS:
Alan S. Hsieh, Sedat Biringen
KEYWORDS:
Direct Numerical Simulation, Rotating Turbulent Flows, Turbulence Structures
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.7 No.2,
February
14,
2019
ABSTRACT: Direct numerical simulations (DNS)
of non-rotating and rotating turbulent channel flow were conducted. The data
base obtained from these DNS simulations was used to investigate the prominent
coherent structures involved in the turbulence generation cycle. Predictions
from three theoretical models concerning the
formation and evolution of sublayer streaks, three-dimensional hairpin
vortices and propagating plane waves were validated using visualizations from
the present DNS data. Quadrant analysis was used to determine a phase shift
between the fluctuating streamwise and wall-normal velocities as a
characteristic of turbulence production in the suction region at a low rotation
number.