Self-consistent model for the saturation mechanism of the response to harmonic forcing in the backward-facing step flow

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This paper proposes a data-driven control design method for nonlinear systems that builds upon the Koopman operator framework. In particular, the Koopman operator is used to lift the nonlinear dynamics to a higher-dimensional space where the so-called obse ...

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Model reduction of coupled systems based on non-intrusive approximations of the boundary response maps

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To enforce the conservation of mass principle, a pressure Poisson equation arises in the numerical solution of incompressible fluid flow using the pressure-based segregated algorithms such as projection methods. For unsteady flows, the pressure Poisson equ ...

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Weakly nonlinear versus semi-linear models of the nonlinear evolution of the centrifugal instability

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In engineering, oscillatory instabilities and resonances are often considered undesirable flow features and measures are taken to avoid them. This may include avoiding certain parametric regions or implementing control and mitigation strategies. However, t ...

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Rock-Flow Cell Parameters Evaluation Using Ultrasound Doppler Velocimetry

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Laterally unconfined neutral or negative buoyancy inflow into a quiescent ambient over sloping bottom

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