1 Contributo su Rivista

1 Contributo su Rivista: [4613] Home page macrotipologia

Sfoglia

Prodotti recenti

Double maxima of angular momentum transport in small gap η = 0.91 Taylor–Couette turbulence

We use experiments and direct numerical simulations to probe the phase space of low-curvature Taylor-Couette flow in the vicinity of the ultimate regime. The cylinder radius ratio is fixed at, where is the inner (outer) cylinder radius. Non-dimensional shear drivings (Taylor numbers) in the range are explored for both co- and counter-rotating configurations. In the range, we observe two local maxima of the angular momentum transport as a function of the cylinder rotation ratio, which can be d...

A finite–difference scheme for three–dimensional incompressible flows in spherical coordinates

In this study we have developed a flexible and efficient numerical scheme for the simulation of three–dimensional incompressible flows in spherical coordinates. The main idea, inspired by a similar strategy as [1] for cylindrical coordinates, consists of a change of variables combined with a discretization on a staggered mesh and the special treatment of few discrete terms that remove the singularities of the Navier–Stokes equations at the sphere centre and along the polar axis. This new meth...

When diffusion faces drift: Consequences of exclusion processes for bi-directional pedestrian flows

Stochastic particle-based models are useful tools for describing the collective movement of large crowds of pedestrians in crowded confined environments. Using descriptions based on the simple exclusion process, two populations of particles, mimicking pedestrians walking in a built environment, enter a room from two opposite sides. One population is passive — being unaware of the local environment; particles belonging to this group perform a symmetric random walk. The other population has inf...

methyLImp2: faster missing value estimation for DNA methylation data

Motivation: methyLImp, a method we recently introduced for the missing value estimation of DNA methylation data, has demonstrated competitive performance in data imputation compared to the existing, general-purpose, approaches. However, imputation running time was considerably long and unfeasible in case of large datasets with numerous missing values. Results: methyLImp2 made possible computations that were previously unfeasible. We achieved this by introducing two important modifications tha...

Convergence of Cluster and Virial expansions for Repulsive Classical Gases

We study the convergence of cluster and virial expansions for systems of particles subject to positive two-body interactions. Our results strengthen and generalize existing lower bounds on the radii of convergence and on the value of the pressure. Our treatment of the cluster coefficients is based on expressing the truncated weights in terms of trees and partition schemes, and generalize to soft repulsions previous approaches for models with hard exclusions. Our main theorem holds in a very g...

Scopri

Accesso al fulltext

no fulltext3495
open517
reserved482
partially open111
mixed6
embargoed2