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Numerical Investigation of Unsteady Boundary-Layer Separation

Telionis,D. P ; Tsahalis,D. Th ; Werle,M. J

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Título:
Numerical Investigation of Unsteady Boundary-Layer Separation
Autor: Telionis,D. P ; Tsahalis,D. Th ; Werle,M. J
Assuntos: CURVE FITTING ; EQUATIONS OF MOTION ; FLOW FIELDS ; FLOW SEPARATION ; Fluid Mechanics ; LAMINAR BOUNDARY LAYER ; NUMERICAL ANALYSIS ; SKIN FRICTION ; UNSTEADY FLOW ; VELOCITY
Notas: DTIC AND NTIS
Descrição: It has been previously indicated both theoretically and experimentally that for steady flow over moving boundaries, the vanishing of skin friction does not mean separation and that separation occurs at a station where the generalized Moore-Rott-Sears (MRS) criterion is satisfied. The authors have earlier indicated numerically that the Goldstein-type separation-singularity appears at the point where the MRS criterion is satisfied. In the present paper and in accordance with the theoretical work of Sears and one of the authors, this idea is extended to unsteady flows. A Goldstein-type of a traveling singularity is discovered and interpreted as 'unsteady boundary-layer separation.' The features of the flow in the neighborhood of this singularity are investigated. (Author) Prepared in cooperation with Cincinnati Univ., Ohio.
Data de criação/publicação: 1972
Idioma: Inglês

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