The nonlinear evolution of secondary instabilities in boundary layers
dc.contributor.author | Crouch, Jeffrey D. | en |
dc.contributor.committeechair | Herbert, Thorwald | en |
dc.contributor.committeemember | Mook, Dean T. | en |
dc.contributor.committeemember | Hendricks, Scott L. | en |
dc.contributor.committeemember | Ragab, Saad A. | en |
dc.contributor.committeemember | Renardy, Michael | en |
dc.contributor.department | Engineering Mechanics | en |
dc.date.accessioned | 2015-06-24T13:35:33Z | en |
dc.date.available | 2015-06-24T13:35:33Z | en |
dc.date.issued | 1988 | en |
dc.description.abstract | Following the concepts of stability analysis, a study is made of the pre-breakdown stage of transition to turbulence in boundary layers. The first step consists of a ’decoupling’ of the primary and secondary instabilities. A perturbation method is used to solve for the primary wave, in the absence of any secondary disturbances. Once the wave is calculated, it is decomposed into a basic flow portion and an interaction portion. The basic flow portion acts as a parametric excitation for the secondary wave. The interaction portion then captures the resonance effects of the secondary back onto the primary. A perturbation method is also used for the secondary and interaction components. The results obtained are in three principal forms: Landau constants, amplitude growth curves, and velocity functions. While in good agreement with experiments and simulations, these results offer new explanations to the observed processes. In addition, a physically-based transition criteria is established. | en |
dc.description.degree | Ph. D. | en |
dc.format.extent | v, 130 leaves | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.uri | http://hdl.handle.net/10919/53684 | en |
dc.language.iso | en_US | en |
dc.publisher | Virginia Polytechnic Institute and State University | en |
dc.relation.isformatof | OCLC# 18361154 | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject.lcc | LD5655.V856 1988.C768 | en |
dc.subject.lcsh | Boundary layer | en |
dc.subject.lcsh | Laminar flow | en |
dc.subject.lcsh | Turbulence | en |
dc.title | The nonlinear evolution of secondary instabilities in boundary layers | en |
dc.type | Dissertation | en |
dc.type.dcmitype | Text | en |
thesis.degree.discipline | Engineering Mechanics | en |
thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
thesis.degree.level | doctoral | en |
thesis.degree.name | Ph. D. | en |
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