Ray tracing particle image velocimetry-Challenges in the application to a packed bed
作者机构：Lehrstuhl für Strömungsmechanik und StrömungstechnikOtto-von-Guericke-Universität Magdeburg39106MagdeburgGermany Institut für Simulation und GraphikOtto-von-Guericke-Universität Magdeburg39106MagdeburgGermany
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第84卷第1期
页 面：194-208页
核心收录：
学科分类：070207[理学-光学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学]
基 金：funded by the Deutsche Forschungsgemeinschaft(DFG German Research Foundation)-Project-ID 422037413-TRR 287.Peter Kovats and our student Zahin Thamed are acknowledged for their help during experiments
主 题：Ray tracing particle image velocimetry(RT-PIV) Transparent spherical particles Packed bed Distortion correction Gas flow
摘 要：Ray tracing Particle Image Velocimetry(RT-PIV)is an optical technique for high resolution velocity measurements in challenging optical systems,such as transparent packed beds,that uses ray tracing to correct for distortions introduced by transparent geometries in the light *** ray tracing based correction is a post processing step applied to the raw PIV particle images before classical PIV *** this study,RT-PIV is performed in the top layer of a body centred cubic(bcc)sphere packing with gaseous flow,where optical access is obtained by the use of transparent N-BK7 glass balls with a diameter of d=40 ***-PIV introduces new experimental and numerical challenges,for example a limited field of view,illumination difficulties,a very large required depth of field and high sensitivity to geometric parameters used in the ray tracing *** challenges and their implications are the main scope and discussed in the present ***,the validation of the ray tracing reconstruction step is presented and examples for the obtained corrected vector fields in a packed bed are *** results show the strength of the method in reconstructing velocity fields behind transparent spheres that would not have been accessible by optical measurement techniques without the ray tracing correction.
维普期刊数据库