Plenary Lecture
Tomographic PTV
Professor Deog Hee Doh
Division of Mechanical & Energy Systems Eng.
Korea Maritime University
Korea
E-mail: doh@hhu.ac.kr
Abstract: A new tomographic PTV(Tomo-PTV) was proposed and its performance was compared with the tomographic PIV(Tomo-PIV). In order to construct the new tomographic PTV for the calculation of the vector fields, an affine transformation was newly introduced. Initial vectors were obtained by the match probability method, and were used for the calculation of the affine transformation in order to get the final vectors. Four-camera based tomographic PTV system was constructed. By adopting a new factor called degree of reality, the real particles were easily separated from ghost particles groups in the reconstructed tomographic voxel images. Two types of flows, a ring vortex and an impinging jet, were tested by the constructed tomographic PTV, and their results were compared with those obtained by the conventional tomographic PIV. The construction method for the voxel images was MLOS-MART method. Strong points and weak points of the two measurement methods, tomo-PTV and tomo-PIV were made.
Brief Biography of the Speaker: Deog Hee DOH received his Ph.D. degree in the Department of Mechanical Engineering in 1995 from the Tokyo University, Japan. He is a professor in the department of Mechanical and Energy Systems Engineering, Korea Maritime University. His current research interests include quantitative flow visualizations, developments of non-contact measurement techniques, and their application to ship and offshore machinery. Most recent research work is the development of the tomographic PTV. He served as a visiting researcher at POSTECH (1995), and as a visiting professor at the Nihon University (2003, 2004). Prof. DOH is now serving as a vice chairman of KSV (Korean Society of Visualization). He is vice editor of KSME (Korean Society of Mechanical Engineers) journal in FED (Fluid Engineering Division). He conducted collaborative research works with Oshima laboratory of the Tokyo University and developed a measurement technique which can measure the motion of flexible body and the flow inside of the body. He is author of about 100 scientific journals.