title: Note: development of a compact x-ray particle image velocimetry for measuring opaque flows. II. Three-dimensional velocity field reconstruction.
abstract: An x-ray particle image velocimetry (PIV) system using a cone-beam type x-ray was developed. The field of view and the spatial resolution are 36 × 24.05 mm(2) and 20 μm, respectively. The three-dimensional velocity field was reconstructed by adopting the least squares minimum residue and simultaneous multiplicative algebraic reconstruction techniques. According to a simulation study with synthetic images, the reconstructions were acceptable with 7 projections and 50 iterations. The reconstructed and supplied flow rates differed by only about 6.49% in experimental verification. The x-ray tomographic PIV system would be useful for 3D velocity field information of opaque flows.
authors.affiliation: Center for Biofluid and Biomimic Research, Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyojadong, Pohang 790-784, South Korea. tjddyd94@postech.ac.kr
authors.forename: Sung Yong
authors.initials: SY
authors.lastname: Jung
authors.forename: Sang Joon
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D012212:Rheology / Q000295:instrumentation*; D014965:X-Rays