Accession Number : ADA137829

Title :   Global PNS (Parabolized Navier-Stokes) Solutions for Laminar and Turbulent Flow.

Descriptive Note : Interim rept.,

Corporate Author : CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Rubin,S G ; Reddy,D R

PDF Url : ADA137829

Report Date : Jul 1983

Pagination or Media Count : 13

Abstract : A multi-sweep relaxation procedure is applied for inviscid and parabolized (pressure-elliptic) Navier-Stokes (PNS) equations. Boattail, finite flat plate and NASA 0012 airfoil geometries are considered for incompressible and subsonic inviscid, laminar and turbulent flow. The equations are written in a conformal body-fitted coordinate frame and differenced on a staggered grid in order to give second-order accuracy for the inviscid flow and somewhere between first and second-order accuracy for the PNS solutions. A full second-order scheme is also discussed. Separation, trailing edge and stagnation point flow are evaluated. The effects of normal pressure gradients for laminar and turbulent flows are compared. A multi-grid procedure is applied in order to speed convergence rates for fine meshes and/or large computational domains. (Author)

Descriptors :   *Laminar flow, *Turbulent flow, *Navier stokes equations, Relaxation, Computations, Incompressible flow, Inviscid flow, Pressure gradients, Viscous flow, Flow separation, Stagnation point, Difference equations, Airfoils, Boattail afterbodies, Trailing edges, Grids, Convergence

Subject Categories : Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE