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Federica Bruno
Università di Enna Kore
CFD
roughness
numerical simulations
PHD school
Innovative Technologies for Engineering and the Built Environment
PhD Cycle
36
List of Supervisors
Mauro De Marchis, Stefano Leonardi
Main research approches
Numerical analysis
Research abstract
A numerical study on the effect of roughness density and distribution towards new roughness parametrization
Background And Research Gaps
Turbulent flows over uneven surfaces are widespread in engineering contexts, ranging from designing airfoils to managing pipe flows. It is crucial to understand the complex association between irregular rough surfaces and turbulent flows, as it holds key significance in forecasting roughness function as well as drag. Despite extensive research over the years, accurately predicting these phenomena remains an ongoing challenge, firstly because of the intricate interplay between surface geometry and the dynamics of fluid flow.The study embarks on a comprehensive exploration of geometrical parameters characterizing irregular rough surfaces and their effect on turbulent flows. The investigation unfolds through two primary avenues: Large Eddy Simulation (LES) techniques applied to channel flows with irregular flat walls generated using Gaussian functions, and Direct Numerical Simulations (DNS) focusing on the influence of isolated peaks on regularly triangular rough walls.
Research Goals
Roughness parametrization.
Methods
DNS and LES simulations.
Results
Geometrical parameter able to predict the roughness effect.