Turbulence measurements with a nano-scale thermal anemometry probe

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/128773
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dc.contributor.authorVallikivi, Margit
dc.contributor.departmentChalmers tekniska högskola / Institutionen för tillämpad mekaniksv
dc.contributor.departmentChalmers University of Technology / Department of Applied Mechanicsen
dc.description.abstractA nanoscale thermal anemometry probe (NSTAP) has been developed for high Reynolds number turbulence measurements. NSTAP has working principles similar to conventional hot-wire anemometry, at the same time having greatly improved spatial and temporal resolution. Fabrication of NSTAP has been conducted, using several semiconductor and MEMS (microelectromechanical system) techniques. Sensing element of NSTAP is a nano-scale wire with dimensions 100 nm x 2 micron x 60 micron or 100 nm x 300 nm x 30 microns. Measurements in grid turbulence were conducted in order to validate the performance of these new sensors. NSTAP was compared to hot-wires with wire lengths 0.5, 0.75, 1.0 and 1.5 mm. Results showed NSTAP having good agreement with conventional hot-wire sensors and demonstrated faster temporal response, as well as better spatial resolution. This marks the first time that a micro-scale velocity sensor free of end- or substrate-conduction has been constructed and successfully tested in a turbulent flow.
dc.relation.ispartofseriesDiploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden : 2010:51
dc.subjectTeknisk mekanik
dc.subjectApplied Mechanics
dc.subjectFluid mechanics
dc.titleTurbulence measurements with a nano-scale thermal anemometry probe
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
Collection:Examensarbeten för masterexamen // Master Theses

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