Influence of the velocity vector base relocation to the center of mass of the interrogation area on PIV accuracy
Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Fluid Dynamics and Thermodynamics, Technická 4, Praha 6 – Dejvice, 166 07, Czech Republic
a Corresponding author: Jan.Kouba@fs.cvut.cz
Published online: 25 March 2014
This paper is aimed at modification of calculation algorithm used in data processing from PIV (Particle Image Velocimetry) method. The modification of standard Multi-step correlation algorithm is based on imaging the centre of mass of the interrogation area to define the initial point of the respective vector, instead of the geometrical centre. This paper describes the principle of initial point-vector assignment, the corresponding data processing methodology including the test track analysis. Both approaches are compared within the framework of accuracy in the conclusion. The accuracy test is performed using synthetic and real data.
© Owned by the authors, published by EDP Sciences, 2014
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