A Study on the Evaluation of Interpolation Methods in PIV

PIV에서의 보간기법의 평가에 관한 연구

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


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.


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