4 results
General Editors’ Preface
- Edited by Tomas Arons, Universiteit Utrecht, The Netherlands, Rianka Rijnhout
-
- Book:
- Mass Harm in Europe
- Published by:
- Intersentia
- Published online:
- 03 April 2024
- Print publication:
- 27 October 2023, pp v-vi
-
- Chapter
- Export citation
-
Summary
It is a special pleasure to welcome the 22nd book in the series The Common Core of European Private Law. This book is edited by two Dutch scholars. Their works are already renowned and appreciated well beyond the ‘Common Core’ circles.
The Common Core project was launched in 1993 at the University of Trento under the auspices of the late Professor Rudolf B. Schlesinger. The methodology used in the Common Core project, then novel, is now a classic. By making use of case studies, it goes beyond mere description to detailed inquiry into how most European Union legal systems resolve specific legal questions in practice, and to thorough comparisons between those systems. It is our hope that these volumes will provide scholars with a valuable tool for research in comparative law and in their own national legal systems. The collection of materials that the Common Core project is off ering to the scholarly community is already quite extensive and will become even more so as more volumes are published. The availability of materials attempting a genuine analysis of how things seem to be is, in our opinion, a prerequisite for an intelligent and critical discussion on how they should be. Perhaps in the future European private law will be authoritatively restated or even codified. As of today, the Common Core project is the longestrunning scholarly enterprise in the field. The analytical work carried out by the more than 300 scholars that have so far joined us in the Common Core project is also a precious asset of knowledge and legitimisation for any such a normative enterprise.
We must thank the editors and contributors for their work. With a sense of deep gratitude, we also wish to recall our late Honorary Editors, Professors Rudolf B. Schlesinger and Rodolfo Sacco.
No scholarly project can survive without committed sponsors. The International University College of Turin allows us to organise the General Meetings together with the Centro Studi di Diritto Comparato of Trieste. The European Commission has partially sponsored some of our past General Meetings, having included them in their High Level Conferences Program.
Double maxima of angular momentum transport in small gap $\eta =0.91$ Taylor–Couette turbulence
- Rodrigo Ezeta, Francesco Sacco, Dennis Bakhuis, Sander G. Huisman, Rodolfo Ostilla-Mónico, Roberto Verzicco, Chao Sun, Detlef Lohse
-
- Journal:
- Journal of Fluid Mechanics / Volume 900 / 10 October 2020
- Published online by Cambridge University Press:
- 06 August 2020, A23
-
- Article
-
- You have access Access
- Open access
- HTML
- Export citation
-
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 $\eta =r_i/r_o=0.91$, where $r_i \, (r_o)$ is the inner (outer) cylinder radius. Non-dimensional shear drivings (Taylor numbers ${\textit {Ta}}$) in the range $10^7\leq {\textit {Ta}}\leq 10^{11}$ are explored for both co- and counter-rotating configurations. In the ${\textit {Ta}}$ range $10^8\leq {\textit {Ta}}\leq 10^{10}$, we observe two local maxima of the angular momentum transport as a function of the cylinder rotation ratio, which can be described as either ‘co-’ or ‘counter-rotating’ due to their location or as ‘broad’ or ‘narrow’ due to their shape. We confirm that the broad peak is accompanied by the strengthening of the large-scale structures, and that the narrow peak appears once the driving (Ta) is strong enough. As first evidenced in numerical simulations by Brauckmann et al. (J. Fluid Mech., vol. 790, 2016, pp. 419–452), the broad peak is produced by centrifugal instabilities and that the narrow peak is a consequence of shear instabilities. We describe how the peaks change with ${\textit {Ta}}$ as the flow becomes more turbulent. Close to the transition to the ultimate regime when the boundary layers (BLs) become turbulent, the usual structure of counter-rotating Taylor vortex pairs breaks down and stable unpaired rolls appear locally. We attribute this state to changes in the underlying roll characteristics during the transition to the ultimate regime. Further changes in the flow structure around ${\textit {Ta}}\approx 10^{10}$ cause the broad peak to disappear completely and the narrow peak to move. This second transition is caused when the regions inside the BLs which are locally smooth regions disappear and the whole boundary layer becomes active.
Dynamics and evolution of turbulent Taylor rolls
- Francesco Sacco, Roberto Verzicco, Rodolfo Ostilla-Mónico
-
- Journal:
- Journal of Fluid Mechanics / Volume 870 / 10 July 2019
- Published online by Cambridge University Press:
- 15 May 2019, pp. 970-987
-
- Article
- Export citation
-
In many shear- and pressure-driven wall-bounded turbulent flows secondary motions spontaneously develop and their interaction with the main flow alters the overall large-scale features and transfer properties. Taylor–Couette flow, the fluid motion developing in the gap between two concentric cylinders rotating at different angular velocities, is not an exception, and toroidal Taylor rolls have been observed from the early development of the flow up to the fully turbulent regime. In this manuscript we show that under the generic name of ‘Taylor rolls’ there is a wide variety of structures that differ in the vorticity distribution within the cores, the way they are driven and their effects on the mean flow. We relate the rolls at high Reynolds numbers not to centrifugal instabilities, but to a combination of shear and anti-cyclonic rotation, showing that they are preserved in the limit of vanishing curvature and can be better understood as a pinned cycle which shows similar characteristics as the self-sustained process of shear flows. By analysing the effect of the computational domain size, we show that this pinning is not a product of numerics, and that the position of the rolls is governed by a random process with the space and time variations depending on domain size.
15 - The sub-Saharan legal tradition
- Edited by Mauro Bussani, Università degli Studi di Trieste, Ugo Mattei, Università degli Studi di Torino, Italy
-
- Book:
- The Cambridge Companion to Comparative Law
- Published online:
- 05 May 2013
- Print publication:
- 16 August 2012, pp 313-343
-
- Chapter
- Export citation
-
Summary
Introduction
The expression ‘African law’ refers to a legal family which is not comprehensive of the African continent as a whole. Northern Africa, namely where the Pharaonic, Persian, Alexandrine, Roman, and Ottoman empires ruled, has a history and legal framework with more in common with the Middle East and the Mediterranean area than with sub-Saharan Africa. South Africa, in turn, underwent an intense Europeanization process, which makes it different from other countries in the continent.
Africa as studied by the comparative lawyer is smaller than Africa measured by the geographer.
To present African law is not an easy task, since disparate realities characterized by contradictory elements coexist therein. Instead, to talk about single components of African law could be relatively easier. On one hand, authoritative law (both colonial and independent) is not very different from European law; it aims to oversee the administrative machine of governance, to manage credit instruments, and control trading companies. On the other hand, traditional law which continues to exist often regulates marriage and family institutions, land tenure regimes, the criminal law sector, and so on.