A Study on the Evaluation of Interpolation Methods in PIV

PIV에서의 보간기법의 평가에 관한 연구

  • 최장운 (한국해양대학교 대학원) ;
  • 조대환 (한국해양대학교 대학원) ;
  • 최민선 (목포해양대학교 기관공학과) ;
  • 이영호 (한국해양대학교 기계시스템공학과)
  • Published : 1996.08.01

Abstract

To maintain high spacial accuracy and rapid CPU time in interpolating data from grid to random position or inversely in PIV, proposed many technuques are compared and discussed mainly in terms of interpolating error and computing time. And artificial PIV atmosphere data is furnished by CFD result. First, for interpolation from grid to random position, multiquadric method gives the highest accuracy with the longest CPU time and Taylor series expansion methods give reasonable accuracy with less calculating load. Secondly, the sub-pixel resolution analysis in estimating the coordinates of the maximum correlation coefficients essential in the grey level correlation PIV reveal that 8-neighbours 2nd-order least square interpolation gives utmost accuracy in terms of the real flow conditions.

Keywords

References

  1. J. Fluid Mech v.129 Numerical Processing of Flow Visualization Pictures-Measurement of Two-Dimensional Vortex Flow K. Imaichi;K. Ohmi
  2. J. Fluid Mech v.185 On the Performance of Particle Tracking J. Agui;J. Jimenez
  3. Exp. in Fluids v.15 Performationance Analysis and Application of Grid Interpolation Techniques for Fluid Flows G. Spedding;E. Ringnot
  4. Exp. in Fluids v.15 Particle Tracking Velocimetry in Three-Dimensional Flows N. Malik Th. Dracos;D. Papantoniou
  5. 朝食書度 流れの可視化へンドプック
  6. Numerical Recipes W. Press(et al.)
  7. Exp. in Fluids v.3 2-Dimensional Particle Tracking Velocimetry(PTV) : Technique and Image Processing Algorithms A. Adamczyk;L.Rimai
  8. Numerical methods in Engineering M. Salvadori;M. Baron
  9. Exp. in Fluids v.10 High Resolution Measurement of Turbulent Structure in a Channel with Particle Image Velocimetry Z. Liu;C. Landreth;R. Adrian;T. Hanratty
  10. Exp. in Fluids v.10 A Cross Correlation Technique for Velocity Field Extraction from Particulate Visualization T. Utami;R. Blackwelder
  11. Exp. in Fluids v.10 Digital Particle Image Velocimetry C. Willert;M. Gharib
  12. J. Comp. Phys v.10 Calculating Three-Dimensional Flows around Structures and over Rough Terrain C. Hirt;J. Cook
  13. Proc. of 5th ACFM v.1 Active Control of Aerodynamic Properties of the 2-D Square Prism by Backward Ejection Young-Ho Lee