On the Growth of Waves in Boundary Layers: a simple Approximate Solution

  • M. Gaster
Conference paper
Part of the IUTAM Symposia book series (IUTAM)


The behaviour of instability waves in boundary layers is considered when the mean flow differs only slightly from a parallel flow. A solution for the instability is sought in the form of a scaled solution of the local parallel flow mode. The scaling is chosen to minimise the deviation of the solution from the full linearised equations of motion. By re-arranging the terms in the governing equation a modified Orr-Sommerfeld equation is formed to define the base solution and this then enables the scaling function to be reduced to a simple integral conservation relation.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • M. Gaster
    • 1
  1. 1.Department of Engineering, Queen Mary & Westfield CollegeUniversity of LondonLondonUK

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