THE field of fluid mechanics involves a range of rich and vibrant problems with complex
dynamics stemming from instabilities, nonlinearities, and turbulence. The analysis of these …

We give a brief review of several prominent fluid instabilities representing transitions driven
by gravity, surface tension, thermal energy, and applied motion/acceleration. Strategies for …

This review article is concerned with the design of linear reduced-order models and control
laws for closed-loop control of instabilities in transitional flows. For oscillator flows, such as …

Solving computational fluid dynamics problems requires using large computational
resources. The computational time and memory requirements to solve realistic problems …

Estimation of the initial state of turbulent channel flow from limited data is investigated using
an adjoint-variational approach. The data are generated from a reference direct numerical …

Flow state can be changed by multiple disturbances and uncertain factors in a complex flow
environment, which calls for great interest to adjust the control law automatically to adapt to …

In this article, we propose a model predictive active power control (APC) enhanced by the
optimal coordination of the structural loadings of wind turbines (WTs) operating with fully …

This work proposes a feedback-loop strategy to suppress intrinsic oscillations of resonating
flows in the fully nonlinear regime. The frequency response of the flow is obtained from the …

This article presents a data-driven model based on modal decomposition, applied to
approximate the low-order statistics of the spatially averaged wall-shear stress in a turbulent …

Obtaining low-order models for unstable flows in a systematic and computationally tractable
manner has been a long-standing challenge. In this study, we show that the Eigensystem …