Coventry University

About: Coventry University is a education organization based out in Coventry, United Kingdom. It is known for research contribution in the topics: Population & Higher education. The organization has 4964 authors who have published 12700 publications receiving 255898 citations. The organization is also known as: Lanchester Polytechnic & Coventry Polytechnic.

Instabilities in a plane channel flow between compliant walls

Abstract: The stability of plane channel flow between compliant walls is investigated for disturbances which have the same symmetry, with respect to the channel centreline, as the Tollmien–Schlichting mode of instability. The interconnected behaviour of flow-induced surface waves and Tollmien–Schlichting waves is examined both by direct numerical solution of the Orr–Sommerfeld equation and by means of an analytic shear layer theory. We show that when the compliant wall properties are selected so as to give a significant stability effect on Tollmien–Schlichting waves, the onset of divergence instability can be severely disrupted. In addition, travelling wave flutter can interact with the Tollmien–Schlichting mode to generate a powerful instability which replaces the flutter instability identified in studies based on a potential mean-flow model. The behaviour found when the mean-flow shear layer is fully accounted for may be traced to singularities in the wave dispersion relation. These singularities can be attributed to solutions which represent Tollmien–Schlichting waves in rigid-walled channels. Such singularities will also be found in the dispersion relation for the case of Blasius flow. Thus, similar behaviour can be anticipated for Blasius flow, including the disruption of the onset of divergence instability. As a consequence, it seems likely that previous investigations for Blasius flow will have yielded very conservative estimates for the optimal stabilization that can be achieved for Tollmien–Schlichting waves for the purposes of laminar-flow control.

Foreign Aid and Inclusive Development: Updated Evidence from Africa, 2005–2012*

Abstract: Motivated by the April 2015 World Bank Publication on MDGs which reveals that poverty has been declining in all regions of the world with the exception of African countries, this study investigates the effects of a plethora of foreign aid dynamics on inequality adjusted human development. Contemporary and non-contemporary OLS, Fixed-effects and a system GMM technique with forward orthogonal deviations are employed. The empirical evidence is based on an updated sample of 53 African countries for the period 2005-2012.The following findings are established. First, the impacts of aid dynamics with high degrees of substitution are positive. These include aid for: social infrastructure, economic infrastructure, the productive sector and multi-sectors. Second, the effect of humanitarian assistance is consistently negative across specifications and models. Third, the effects of programme assistance and action on debt are ambiguous because they become positive with the GMM technique. Justifications for these changes and clarifications with respect to existing literature are provided. Policy implications are discussed in the light of the post-2015 development agenda. We also provide some recommendations for a rethinking of theories and models on which development assistance is based.

Tourism, place identities and social relations in the European rural periphery.

Abstract: Rural areas in many peripheral areas of Europe have turned to tourism as an alternative development strategy in the face of changes to the agricultural food production system. Particularly in more remote and less agriculturally viable areas, national and European-level policies have often concentrated on trying to encourage ‘bottom-up’ development revolving around the commodification of local cultural resources or ‘knowledges’. The extent to which this occurs, however, varies between places. The aim in this article is to use case-study evidence from two peripheral rural locations in Europe to explore why these variations occur. It is argued that the extent to which tourism is adopted or rejected by actors within rural places is determined by the unique configurations of historically layered and newer social relations which intersect within and between such places. These configurations shape the contested ways in which local knowledges are valorized and contribute to the existence of multiple senses of pla...