Accession Number : ADA117806

Title :   New Higher-Order Boundary-Layer Equations for Laminar and Turbulent Flow Past Axisymmetric Bodies.

Descriptive Note : Technical rept.,


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 boundary-layer equations accounting for flow field non-uniformities such as curvature effects, normal stress and pressure variations as well as separation, are derived. The boundary-layer 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 boundary-layer 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 boundary-layer thickening as well as separation. The accuracy of the parabolic equations was compared with Van Dyke's higher-order boundary-layer 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