We investigate the local self-sustained process underlying spiral turbulence in counter-rotating Taylor-Couette flow using a periodic annular domain, shaped as parallelogram, two of whose sides are aligned with cylindrical helix described by pattern. The primary focus study is placed on emergence drifting-rotating waves ({\sc drw}) that capture, relatively small main features coherent structure...

Corrugated structured packings feature strong preferential flow directions due to their structure of crossing triangular channels. This leads to good radial spreading but makes modelling a challenge. Detailed CFD calculations reflecting the exact packing structure are only feasible for small sections of packing. However, effects like large scale maldistribution and instabilities in the flow fie...

We argue that the situation calculus is a natural formalism for representing and reasoning about control and strategic information. As a case study, in this paper we provide a situation calculus semantics for the Prolog cut operator, the central search control operator in Prolog. We show that our semantics is well-behaved when the programs are properly stratif ied. We also show that according t...

his investigation was carried out to reveal the impact of solar radiation on wind flow structure and pollutant dispersion in an urban street canyon of aspect ratio of one using the computational fluid dynamic (cfd) technique. the simulation results (velocity and concentration data) show that heating from building wall surfaces and ground lead to strong buoyancy forces as the air is heated by th...

In this paper, we aim to monitor the flow of people in large public infrastructures. We propose an unsupervised methodology to cluster people flow patterns into the most typical and meaningful configurations. By processing 3D images from a network of depth cameras, we built a descriptor for the flow pattern. We define a data-irregularity measure that assesses how well each descriptor fits a dat...