Computation of high Reynolds number flow around a circular cylinder with surface roughness
Abstract
Incompressible highReynoldsnumber flow around a circular cylinder is analyzed by direct integration of the NavierStokes equations using the finitedifference method. A generalized coordinate system is used, so that enough grid points are distributed in the boundary layer and the wake. A new numerical scheme which suppresses nonlinear instability for calculations of highReynoldsnumber flow is developed. The computation of the impulsively started flow at Re = 1200 is compared with corresponding experimental observations and excellent agreement is obtained. A series of computations are carried out on the flow around a circular cylinder with surface roughness. The height of the roughness in these computations is 0.5 percent of the diameter. The range of Reynolds number is from 1,000 to 100,000; no turbulent model is employed. A sharp reduction of the drag coefficient is observed near Re = 20,000, which indicates that the critical Reynolds number is captured in the present computation.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1984
 Bibcode:
 1984aiaa.meetS....K
 Keywords:

 Circular Cylinders;
 Computational Fluid Dynamics;
 Flow Distribution;
 High Reynolds Number;
 NavierStokes Equation;
 Surface Roughness Effects;
 Boundary Layer Flow;
 Drag Reduction;
 Finite Difference Theory;
 Incompressible Flow;
 Numerical Integration;
 Viscous Flow;
 Fluid Mechanics and Heat Transfer