12 citations · 15 across the 5 of their papers we have counts for
5 papers · 1 filter
Objective early identification of kinematic instabilities in shear flows
Bjoern F. Klose, Mattia Serra, Gustaaf B. Jacobs
A kinematic approach for the identification of flow instabilities is proposed. By defining a flow instability in the Lagrangian frame as the increased folding of lines of fluid par…
Vortex boundaries as barriers to diffusive vorticity transport in two-dimensional flows
Stergios Katsanoulis, Mohammad Farazmand, Mattia Serra +1
We put forward the idea of defining vortex boundaries in planar flows as closed material barriers to the diffusive transport of vorticity. Such diffusive vortex boundaries minimize…
The Kinematics of Lagrangian Flow Separation in External Aerodynamics
Bjoern F. Klose, Mattia Serra, Gustaaf B. Jacobs
Kinematic aspects of flow separation in external aerodynamics are investigated in the Lagrangian frame. Specifically, the initial motion of upwelling fluid material from the wall i…
Material spike formation in high Reynolds number flow separation
Mattia Serra, Sean Crouzat, Gael Simon +2
We apply the recent frame-invariant theory of separation spike formation to complex unsteady flows including a turbulent separation bubble, an impinging jet, and flows around a fre…
Variational Lagrangian formulation of the Euler equations for incompressible flow: A simple derivation
Mohammad Farazmand, Mattia Serra
In 1966, Arnold [1] showed that the Lagrangian flow of ideal incompressible fluids (described by Euler equations) coincide with the geodesic flow on the manifold of volume preservi…