Wakes of wall-bounded turbulent flows past patches of circular cylinders by Claudia Nicolai (Southampton)
Duration: 35 mins 42 secs
Share this media item:
Embed this media item:
Embed this media item:
About this item
| Description: |
Talk given by Dr Claudia Nicolai (University of Southampton/Politecnico di Torino) at the Aerodynamics and Flight Mechanics group, University of Southampton, on 13 March 2019, as part of the Southampton/AFM seminar series.
The talk describes experimental studies of the wake of a porous body (represented by an array of circular cylinders) impinged by a deep turbulent boundary layer, and its comparison with the flow past an equivalent solid body |
|---|
| Created: | 2019-04-18 15:20 |
|---|---|
| Collection: | UKFN_Southampton_AFM |
| Publisher: | University of Cambridge |
| Copyright: | Dr Claudia Nicolai |
| Language: | eng (English) |
| Keywords: | Porous body; Circular cylinder array; Transport processes; Turbulent boundary layer; Wakes; Circular patch; |
| Abstract: | A porous body impinged by a turbulent boundary layer is a flow phenomenon that is widely encountered in environmental and industrial Fluid Mechanics. Examples include atmospheric boundary layers over patches of forest, wind farms or buildings, rivers over vegetated beds, currents impinging on offshore structures and tidal turbines, to name just a few. In all these examples the porous body can be represented as an array of obstacles, which modifies the flow so as to affect momentum, energy and scalar transport processes, which are economically and environmentally relevant.
Experimental evidence on the properties of the wake generated by a porous body impinged by a deep turbulent boundary layer will be presented. The body consists of an array of cylinders covering a circular patch of diameter D. The wake properties are systematically tested under different level of density (ϕ = covered planar area per total surface) and compared to the flow past a solid body of equivalent diameter and height. |
|---|---|
Available Formats
| Format | Quality | Bitrate | Size | |||
|---|---|---|---|---|---|---|
| MPEG-4 Video | 1280x720 | 2.06 Mbits/sec | 553.69 MB | View | Download | |
| WebM | 1280x720 | 737.82 kbits/sec | 193.01 MB | View | Download | |
| WebM | 640x360 | 211.19 kbits/sec | 55.25 MB | View | Download | |
| iPod Video | 480x360 | 520.49 kbits/sec | 136.10 MB | View | Download | |
| MP3 | 44100 Hz | 249.83 kbits/sec | 65.63 MB | Listen | Download | |
| Auto * | (Allows browser to choose a format it supports) | |||||