Based on PIV measurements obtained in planes along the main flow direction, a snapshot POD based on the full velocity field is performed. The dominant POD coefficients associated to the mean flow, are interpolated in the whole space domain according to boundary flow properties. From the knowledge of these POD coefficients, the entire mean-flow field is reconstructed and a 3D mean-flow representation is obtained. An application is presented using PIV measurements performed in in-cylinder engine flow.

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