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Browsing by Author George, Papadakis

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    • Flow Reconstruction Around a Surface-Mounted Prism from Sparse Velocity andor Scalar Measurements Using a Combination of POD and a Data-Driven Estimator
    Authors: Shengqi, Lu; George, Papadakis;  Advisor: -;  Co-Author: - (2023)

    A data-driven algorithm is proposed for flow reconstruction from sparse velocity and/or scalar measurements. The algorithm is applied to the flow around a two-dimensional, wall-mounted, square prism. To reduce the problem dimensionality, snapshots of flow and scalar fields are processed to derive POD modes and their time coefficients. Then a system identification algorithm is employed to build a reduced order, linear, dynamical system for the flow and scalar dynamics. Optimal estimation theory is subsequently applied to derive a Kalman estimator to predict the time coefficients of the POD modes from sparse measurements. Analysis of the flow and scalar spectra demonstrate that the flow...