
Accession Number : ADA117806
Title : New HigherOrder BoundaryLayer Equations for Laminar and Turbulent Flow Past Axisymmetric Bodies.
Descriptive Note : Technical rept.,
Corporate Author : RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATHEMATICAL SCIENCES
Personal Author(s) : Kleinstreuer,C ; Eglima,A ; Flaherty,J E
PDF Url : ADA117806
Report Date : Apr 1982
Pagination or Media Count : 37
Abstract : New sets of boundarylayer equations accounting for flow field nonuniformities such as curvature effects, normal stress and pressure variations as well as separation, are derived. The boundarylayer flow domain in subdivided into: (1) a parabolic region where the fluid flow is approximately parallel to the submerged body, i.e., vu; and (2) an elliptic region which includes the line of separation where significant interactions between the boundarylayer and the outer potential flow occur, i.e., v approx u. Closure for the turbulent flow equations has to be obtained with submodels for the Reynolds stresses which reflect the effects of boundarylayer thickening as well as separation. The accuracy of the parabolic equations was compared with Van Dyke's higherorder boundarylayer equations for laminar flow past a body with longitudinal curvature. The results demonstrate that the new modeling equations make a measurable difference as expected from observations made by Bradshaw and others. (Author)
Descriptors : *Boundary layer flow, Laminar flow, Turbulent flow, Curvature, Flow fields, Equations of motion, Partial differential equations
Subject Categories : Theoretical Mathematics
Fluid Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE