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Part DETACHMENT AND ATTACHMENT SEPARATION LINES

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Part 2 : DETACHMENT AND ATTACHMENT SEPARATION LINES DETACHMENT AND ATTACHMENT SEPARATION SURFACES Separation in three-dimensional steady flows

  • line going

  • attachment saddle

  • vertical contraction

  • attachment separation

  • streamline skin

  • separation line

  • skin friction


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Language English
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Separation in three-dimensional steady flowsPart 2 : DETACHMENT AND ATTACHMENT SEPARATION LINES DETACHMENT AND ATTACHMENT SEPARATION SURFACES
Separation lines or separatricesAseparation lineis a skin friction line going through a saddle point.According to the flow direction, it is associated either to a detachmentor an attachment process.Separation lineDetachment type (or separation)Separation lineAttachment type
Flow in the vicinity of a detachment lineStreamtube mass flow rate:qmVnh=cst.hnDetachment saddle point)(f2Streamlines)(l2nn)(f1()l1hhhnnSeparation lineSkin friction linesThe flow detaches from the wallConvergence of the skin friction lines when approaching the separation line entailsa vertical dilatation of the streamtube: the flow springs up from the wall or detaches.