Study of incompressible separated flow using an implicit timedependent technique
Abstract
It is pointed out that accurate numerical simulation of highReynolds number incompressible separated flows poses a significant challenge even for simple twodimensional configurations. An unsteady analysis which needs significant computer resources is required to study such flows numerically. For many physical configurations of engineering and scientific relevance, such as airfoils, diffusers, and turbomachinery cascades, the resulting unsteady separatingreattaching shear flows necessitate a true timedependent analysis. The present investigation is, therefore, mainly concerned with the development of an efficient unsteady flow analysis. The developed analysis for the study of separated viscous flow uses the conservation form of the incompressible NavierStokes equations in generalized orthogonal coordinates so that the analysis is versatile enough to treat flow geometries of arbitrary shape. The numerical method developed uses central differences for all spatial derivatives and provides an accurate solution for flow inside a backstep channel.
 Publication:

6th Computational Fluid Dynamics Conference
 Pub Date:
 1983
 Bibcode:
 1983cfd..conf..686O
 Keywords:

 Computational Fluid Dynamics;
 Incompressible Flow;
 NavierStokes Equation;
 Separated Flow;
 Unsteady Flow;
 Boundary Value Problems;
 Conservation Equations;
 Finite Difference Theory;
 Stream Functions (Fluids);
 Time Dependence;
 Two Dimensional Flow;
 Vorticity Equations;
 Fluid Mechanics and Heat Transfer