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Found 1 result

  1. giansorr83
    Hello to everybody. I am elaborating some images of a turbulent jet. I am able to detect the contours of the jet with the related points. I want to compute the velocity field and the related stretch rate. So I need to compute the first and the second derivative of every point of my contour. The problem is that the points are not ordered. The Dx is very random and the contour presents a lot of vortex... I have tried to implemented a 5 costant central scheme to compute the derivative but it fails...I think that it depends from the structure of my data. Anybody could help me?
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