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Experiments in Fluids

, 58:78 | Cite as

Light-field camera-based 3D volumetric particle image velocimetry with dense ray tracing reconstruction technique

  • Shengxian ShiEmail author
  • Junfei Ding
  • T. H. New
  • Julio Soria
Research Article

Abstract

This paper presents a dense ray tracing reconstruction technique for a single light-field camera-based particle image velocimetry. The new approach pre-determines the location of a particle through inverse dense ray tracing and reconstructs the voxel value using multiplicative algebraic reconstruction technique (MART). Simulation studies were undertaken to identify the effects of iteration number, relaxation factor, particle density, voxel–pixel ratio and the effect of the velocity gradient on the performance of the proposed dense ray tracing-based MART method (DRT-MART). The results demonstrate that the DRT-MART method achieves higher reconstruction resolution at significantly better computational efficiency than the MART method (4–50 times faster). Both DRT-MART and MART approaches were applied to measure the velocity field of a low speed jet flow which revealed that for the same computational cost, the DRT-MART method accurately resolves the jet velocity field with improved precision, especially for the velocity component along the depth direction.

Notes

Acknowledgements

Financial support provided by National Natural Science Foundation of China (Grant No. 11472175), Shanghai Raising Star Program (Grant No. 15QA1402400) and Singapore Ministry of Education AcRF Tier-2 Grant (Grant No. MOE2014-T2-1-002) are gratefully acknowledged.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Shengxian Shi
    • 1
    Email author
  • Junfei Ding
    • 1
  • T. H. New
    • 2
  • Julio Soria
    • 3
    • 4
  1. 1.School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingaporeSingapore
  3. 3.Laboratory for Turbulence Research in Aerospace and Combustion, Department of Mechanical and Aerospace EngineeringMonash UniversityMelbourneAustralia
  4. 4.Department of AeronauticsKing Abdulaziz UniversityJeddahKingdom of Saudi Arabia

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