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Mechanical Engineering

Drag reduction

2013

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Flows In Grooved Channels, Alireza Mohammadi Sep 2013

Flows In Grooved Channels, Alireza Mohammadi

Electronic Thesis and Dissertation Repository

This dissertation presents the analysis of effects of two-dimensional grooves on flow responses in laminar channel flows. Straight grooves have been considered which may have an arbitrary cross-section and an arbitrary orientation with respect to the flow direction. It has been shown that the grooves effects can be split into two parts; one due to the change in the mean positions of the walls and the other due to the flow modulations created by the groove geometry. The former effect can be determined analytically, while the latter effect requires numerical modelling. Projection of groove shape onto a Fourier space creates ...