Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Chiarini, Alessandro"'
The addition of polymers fundamentally alters the dynamics of turbulent flows in a way that defies Kolmogorov predictions. However, we now present a formalism that reconciles our understanding of polymeric turbulence with the classical Kolmogorov phe
Externí odkaz:
http://arxiv.org/abs/2410.03237
We address the Reynolds-number dependence of the turbulent skin-friction drag reduction induced by streamwise-travelling waves of spanwise wall oscillations. The study relies on direct numerical simulations of drag-reduced flows in a plane open chann
Externí odkaz:
http://arxiv.org/abs/2409.07230
We investigate the fluid-solid interaction of suspensions of Kolmogorov-size spherical particles moving in homogeneous isotropic turbulence at a microscale Reynolds number of $Re_\lambda \approx 140$. Two volume fractions are considered, $10^{-5}$ an
Externí odkaz:
http://arxiv.org/abs/2409.02467
Autor:
Chiarini, Alessandro, Boujo, Edouard
The laminar flow past rectangular prisms is studied in the space of length-to-height ratio ($1 \le L/H \le 5$), width-to-height ratio ($1.2 \le W/H \le 5$) and Reynolds number ($Re \lessapprox 700$). The primary bifurcation is investigated with linea
Externí odkaz:
http://arxiv.org/abs/2405.04705
Publikováno v:
J. Fluid Mech. 988 (2024) A17
We investigate by direct numerical simulations the fluid-solid interaction of non-dilute suspensions of spherical particles moving in triperiodic turbulence, at the relatively large Reynolds number of $Re_\lambda \approx 400$. The solid-to-fluid dens
Externí odkaz:
http://arxiv.org/abs/2404.16475
We investigate the influence of dispersed solid spherical particles on the largest scales of the turbulent Arnold-Beltrami-Childress (ABC) flow. The ABC flow is an ideal instance of a complex flow: it does not have solid boundaries, but possesses an
Externí odkaz:
http://arxiv.org/abs/2310.08777
The interaction between near-wall turbulence and wall curvature is described for the incompressible flow in a plane channel with a small concave-convex-concave bump on the bottom wall, with height comparable to the wall-normal location of the main tu
Externí odkaz:
http://arxiv.org/abs/2308.09039
Exact budget equations are derived for the coherent and stochastic contributions to the second-order structure function tensor. They extend the anisotropic generalised Kolmogorov equations (AGKE) by considering the coherent and stochastic parts of th
Externí odkaz:
http://arxiv.org/abs/2302.09305
The separating and reattaching turbulent flow past a rectangular cylinder is studied to describe how small and large scales contribute to the sustaining mechanism of the velocity fluctuations. The work is based on the Anisotropic Generalised Kolmogor
Externí odkaz:
http://arxiv.org/abs/2207.05799
Dimples are small concavities imprinted on a flat surface, known to affect heat transfer and also flow separation and aerodynamic drag on bluff bodies when acting as a standard roughness. Recently, dimples have been proposed as a roughness pattern th
Externí odkaz:
http://arxiv.org/abs/2207.04446