... ( v ¯ y y + u ¯ x y ) + α 2 ( v ¯ x x − u ¯ x y ) For evaluating the error of the solution, we applied similar methods proposed by Liu and Shen [ 21 ]. In detail, the intensity and the optical-flow velocity vectors can be expressed...

...The Hung Tran; Lin Chen In this study, ability of an optical-flow algorithm in extracting wake structure of axisymmetric model was investigated. The initial data for optical-flow processing were obtained in low-speed conditions by particle image velocimetry method. The Reynolds number based...

...Tianshu Liu; David M. Salazar; Hassan Fagehi; Hassan Ghazwani; Javier Montefort; Parviz Merati A hybrid method for particle image velocimetry (PIV) is developed to overcome the limitations of the optical flow method applied to PIV images with large displacements. The main elements of the hybrid...