Global PNS (Parabolized Navier-Stokes) Solutions for Laminar and Turbulent Flow.
CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS
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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 andor large computational domains. Author
- Numerical Mathematics
- Fluid Mechanics