Calculation of Trailing-Edge, Stern and Wake Flows by a Time-Marching Solution of the Partially-Parabolic Equations.
Abstract
This report describes in detail a computational method for the solution of the partially-parabolic (or semi-elliptic or parabolized) Reynolds-averaged Navier-Stokes equations for the calculation of external flow around ship-like three-dimensional bodies. Among the main features of the method are the following. Numerically-generated body-fitted coordinates are used to facilitate applications to a wide variety of shapes. The convective-transport equations are discretized using the finite-analytic scheme which employs analytic solutions of the locally-linearized equations. A time-marching algorithm is employed to enable future extensions to be made to handle unsteady and fully elliptic problems. A two-step global pressure-correction algorithm has been developed to accelerate convergence. The method can be used with large solution domains in order to capture the viscous-inviscid interaction so that iterative matching between separate viscous-flow and potential-flow solutions is not necessary. For turbulent flows, the well known k-epsilon model is used, but with a more convenient and realistic treatment of the flow close to solid walls. The generality and flexibility of the method are demonstrated by applications to several two-dimensional, axisymmetric and three-dimensional flows. Keywords include: Thick 3D boundary layer; Stern Flow; Wake; Partially-parabolic equations; Turbulence models; Body-fitted coordinates; Computational fluid dynamics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1985
- Accession Number
- ADA156673
Entities
People
- H. C. Chen
- Virendra C. Patel
Organizations
- University of Iowa