| Summary: | This work describes a method for determining a three-dimensional velocity profile of a flow through a micro geometry. The aim of this thesis is to further develop a micro-PIV method previously used to measure displacements and deformations in a plane. Micro-PIV methods are not a in it self a new method in this sorts of applications, on the contrary, it is a well known and documented method for measuring and calculating velocities and deformations in micro scales. The recent progress in micro-technology pushes the development of measuring techniques adapted for micro-geometries forward. The method that is developed in this thesis is not interesting entirely for scientists but also for companies in areas such as wood fiber products, polymer composites, micro fluidics and biomaterial. The unique in this method is to show that the technique can be used to measure a tree- dimensional velocity profile. The method that this work is based on has been developed at Luleå University of Technology. The earlier method is based on correlation calculation between images that has been taken with a CCD-camera, parted with a time interval. The achieving goal with PIV-methods is to compare the intensity between these images, and in that way find the displacements on the specimen. The development in this thesis is to gather data from layers through a capillary tube. The gathered information is then put together, and this gives a picture of the flow through the geometry in a three-dimensional perspective. The head alignment in this work has been to find a qualitative picture of the three-dimensional velocity profile. The trail setup does not allow any quantitative validation of the velocities. Therefore has the concentration in the work been to find a method with potential for future development, that measures the shape of the velocity profile in a truthfully way. The method that has been developed in this work and that is built on the earlier PIV-method is developed in the mathematic program Matlab. This program is suitable for the ...
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