36 citations · 105 across the 10 of their papers we have counts for
10 papers
Scaling of secondary flows with surface parameters: a linear approach
Gerardo Zampino, Davide Lasagna, Bharathram Ganapathisubramani
Secondary flows are generated when a lateral variation of the topography, such as streamwise aligned ridges, is imposed to a turbulent wall-bounded flow. In this case, the flow fie…
Linearised Reynolds-Averaged predictions of secondary currents in turbulent channels with topographic heterogeneity
Gerardo Zampino, Davide Lasagna, Bharathram Ganapathisubramani
A rapid predictive tool based on the linearised Reynolds-averaged Navier-Stokes equations is proposed in this work to investigate secondary currents generated by streamwise-indepen…
A-priori sparsification of Galerkin-based reduced order models
Riccardo Rubini, Davide Lasagna, Andrea Da Ronch
A methodology to generate sparse Galerkin models of chaotic/unsteady fluid flows containing a minimal number of active triadic interactions is proposed. The key idea is to find an…
Finding unstable periodic orbits: a hybrid approach with polynomial optimization
Mayur Lakshmi, Giovanni Fantuzzi, Sergei Chernyshenko +1
We present a novel method to compute unstable periodic orbits (UPOs) that optimize the infinite-time average of a given quantity for polynomial ODE systems. The UPO search procedur…
-based sparsification of energy interactions in two-dimensional turbulent flows
Riccardo Rubini, Davide Lasagna, Andrea Da Ronch
In this paper, sparsity-promoting regression techniques are employed to automatically identify from data relevant triadic interactions between modal structures in large Galerkin-ba…
Sensitivity of long periodic orbits of chaotic systems
Davide Lasagna
The properties of long, numerically-determined periodic orbits of two low-dimensional chaotic systems, the Lorenz equations and the Kuramoto-Sivashinsky system in a minimal-domain…