A Numerical simulation of transition in plane channel flow
Abstract
A numerical simulation of the final stages of transition to turbulence in plane channel flow at a Reynolds number of 7500 is described. Three dimensional, incompressible NavierStokes equations are numerically integrated to obtain the time evolution of two and three dimensional finite amplitude disturbances. Computations are performed on the CYBER203 vector processor for a 32 by 33 by 32 grid. Solutions indicate the existence of structures similar to those observed in the laboratory and which are characteristic of various stages of transition that lead to final breakdown. Details of the resulting flow field after breakdown indicate the evolution of streaklike formations found in turbulent flows. Although the flow field does approach a steady state (turbulent channel flow), implementation of subgridscale terms are necessary to obtain proper turbulent statistics.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 August 1982
 Bibcode:
 1982STIN...8232636G
 Keywords:

 Channel Flow;
 Flow Distribution;
 Numerical Flow Visualization;
 Transition Flow;
 Turbulent Flow;
 High Reynolds Number;
 Incompressible Flow;
 NavierStokes Equation;
 Three Dimensional Flow;
 Time Dependence;
 Two Dimensional Flow;
 Fluid Mechanics and Heat Transfer