Print Email Facebook Twitter Holographic particle image velocimetry using Bacteriorhodopsin Title Holographic particle image velocimetry using Bacteriorhodopsin Author Koek, W.D. Contributor Braat, J.J.M. (promotor) Westerveel, J. (promotor) Faculty Applied Sciences Date 2006-02-13 Abstract To gain better insight into the behaviour of turbulent flow there is a demand for a practical measurement instrument to perform three-dimensional flow measurements. Holography is a three-dimensional imaging technique, and as such is ideally suited for this purpose. Because flow media (such as water and air) are generally transparent, optical measurements in such media are enabled by adding small particles to the flow of interest. When the position of such a particle is known at two instances (by recording two holograms of the particle field), the local flow vector may be deduced. The holographic system that has been developed throughout this research uses the light-sensitive protein bacteriorhodopsin (BR) as the recording medium. We studied the properties of BR, with a focus on the practical applicability of this material and the development of new techniques. The BR molecule has the special property that it is sensitive to the polarization of the illuminating light. This allows the storage of two independent holograms inside a single BR film. Our concept of polarization multiplexing gives our system a number of distinct advantages over other recently demonstrated holographic measurement systems. It makes our system inherently more robust and accurate. To demonstrate the capabilities of the system, a number of measurements were performed on a multiphase jet. In such a measurement we determined the displacement of more than one thousand particles in a volume of less than 0.1 cm^3. Using our system, it was possible for one person to perform thirty multiphase jet measurements within eight hours. This would have been impossible with any other holographic measurement system. As such, this research has made a significant step towards holography becoming a standard research tool in fluid dynamics. Subject holographyholographic particle image velocimetryhpivbacteriorhodopsinbr To reference this document use: http://resolver.tudelft.nl/uuid:2af71362-c95b-41c7-9249-c8e8a23165e9 ISBN 90-78314-01-X Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2006 W.D. Koek Files PDF as_koek_20060213.pdf 11.58 MB Close viewer /islandora/object/uuid:2af71362-c95b-41c7-9249-c8e8a23165e9/datastream/OBJ/view