Scale-Invariance and Turbulence Models for Large-Eddy SimulationAnnual Review of Fluid Mechanics - Tập 32 Số 1 - Trang 1-32 - 2000
Charles Meneveau, Joseph Katz
▪ Abstract Relationships between small and large scales of motion in turbulent flows are of much interest in large-eddy simulation of turbulence, in which small scales are not explicitly resolved and must be modeled. This paper reviews models that are based on scale-invariance properties of high-Reynolds-number turbulence in the inertial range. The review starts with the Smagorinsky model...... hiện toàn bộ
Analysis of Fluid Flows via Spectral Properties of the Koopman OperatorAnnual Review of Fluid Mechanics - Tập 45 Số 1 - Trang 357-378 - 2013
Igor Mezić
This article reviews theory and applications of Koopman modes in fluid mechanics. Koopman mode decomposition is based on the surprising fact, discovered in Mezić (2005) , that normal modes of linear oscillations have their natural analogs—Koopman modes—in the context of nonlinear dynamics. To pursue this analogy, one must change the representation of the system from the state-space repres...... hiện toàn bộ
Sand Ripples and DunesAnnual Review of Fluid Mechanics - Tập 45 Số 1 - Trang 469-493 - 2013
François Charru, Bruno Andreotti, Philippe Claudin
An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms grow. This review discusses the following issues, in light of the recent literature: What are the relevant dynamical mechanisms controlling the emergence of bed forms? Do they form by linear instability or nonlinear processes such as pattern coarsening? What determines their timescales and length ...... hiện toàn bộ
BLOOD FLOW IN ARTERIESAnnual Review of Fluid Mechanics - Tập 29 Số 1 - Trang 399-434 - 1997
David N. Ku
▪ Abstract Blood flow in arteries is dominated by unsteady flow phenomena. The cardiovascular system is an internal flow loop with multiple branches in which a complex liquid circulates. A nondimensional frequency parameter, the Womersley number, governs the relationship between the unsteady and viscous forces. Normal arterial flow is laminar with secondary flows generated at curves and b...... hiện toàn bộ
Transition and Stability of High-Speed Boundary LayersAnnual Review of Fluid Mechanics - Tập 43 Số 1 - Trang 79-95 - 2011
А. В. Федоров
This article reviews stability and laminar-turbulent transition in high-speed boundary-layer flows, emphasizing qualitative features of the disturbance spectrum leading to new mechanisms of receptivity and instability. It is shown that the extension of subsonic and low-supersonic stability concepts and transition prediction methods to hypersonic speeds is not straightforward. The discussi...... hiện toàn bộ
MODELING OF FLUID-STRUCTURE INTERACTIONAnnual Review of Fluid Mechanics - Tập 33 Số 1 - Trang 445-490 - 2001
Earl H. Dowell, Kenneth C. Hall
▪ Abstract The interaction of a flexible structure with a flowing fluid in which it is submersed or by which it is surrounded gives rise to a rich variety of physical phenomena with applications in many fields of engineering, for example, the stability and response of aircraft wings, the flow of blood through arteries, the response of bridges and tall buildings to winds, the vibration of...... hiện toàn bộ