Mesure des propriétés thermiques des matériaux

Yves Jannot, Alain Degiovanni

La maîtrise de l’énergie dans le secteur industriel et la réduction de sa consommation dans les bâtiments seront des éléments clés de la transition énergétique. Pour atteindre ces objectifs, il est nécessaire d’utiliser, dans le premier cas, des matériaux ayant des caractéristiques thermiques adaptées à leur utilisation et, dans le second cas, des matériaux isolants ou même superisolants. Dans les deux cas, leur utilisation optimale nécessite une parfaite connaissance de leurs propriétés thermiques.
Le présent ouvrage se veut donc accessible à tous ceux, thermiciens ou non, qui ont besoin de mesurer les propriétés thermiques d’un matériau. L’objectif est de leur permettre de choisir la méthode de mesure la mieux adaptée au matériau à caractériser et de leur transmettre toutes les informations permettant de la mettre en œuvre avec le maximum de précision.

Gravity Energy Storage

Asmae Berrada, Khalid Loudiyi

Gravity Energy Storage provides a comprehensive analysis of a novel energy storage system that is based on the working principle of well-established, pumped hydro energy storage, but that also recognizes the differences and benefits of the new gravity system. This book provides coverage of the development, feasibility, design, performance, operation, and economics associated with the implementation of such storage technology. In addition, a number of modeling approaches are proposed as a solution to various difficulties, such as proper sizing, application, value and optimal design of the system.

Finite element method and Medical Imaging Techniques in Bone Biomechanics

Rabeb Ben Kahla, Abdelwahed Barkaoui, Tarek Merzouki

Digital models based on data from medical images have recently become widespread in the field of biomechanics. This book summarizes medical imaging techniques and processing procedures, both of which are necessary for creating bone models with finite element methods. Chapter 1 introduces the main principles and the application of the most commonly used medical imaging techniques. Chapter 2 describes the major methods and steps of medical image analysis and processing. Chapter 3 presents a brief review of recent studies on reconstructed finite element bone models, based on medical images. Finally, Chapter 4 reveals the digital results obtained for the main bone sites that have been targeted by finite element modeling in recent years.

ircraft Wake Vortex Alleviation: An Experimental Approach

Omer El Matbagi

Motivation behind the present investigation is the alleviation of the rolling moment induced on the following aircraft by means of a DSS's. Particle image velocimetry was used to characterize wing tip vortex structures as well as quantifying vortex meandering. DSS capabilities in modifying the span-wise wing load and further reduces the wake vortex hazard were carried out. PIV technique was used to measure the wake velocities down-stream of the aircraft half model. Results reveal a noticeable inboard shift of wing loading along with the direct interaction of the spoiler's wake and flap tip vortex for the inboard loading cases. Implementation of DSS results in a substantial redistribution of the flap tip vortex circulation. A 44% decrease of the maximum cross-flow velocity was recorded for the case of deployed spoilers. Evaluations of the outboard loading results indicate a limited diffusion experienced by the vortex due to the increased level of turbulence. DSS's capabilities as a wake vortex attenuation device reveals, while position of the maximum induced rolling moments is little influenced by the DSS's, the maximum induced rolling moment coefficient was reduced to one third.

Hybrid Energy System Models

Asmae Berrada, Rachid El Mrabet

Hybrid Energy System Models presents a number of techniques to model a large variety of hybrid energy systems in all aspects of sizing, design, operation, economic dispatch, optimization and control. The book's authors present a number of new methods to model hybrid energy systems and several renewable energy systems, including photovoltaic, solar plus wind and hydropower, energy storage, and combined heat and power systems. With critical modeling examples, global case studies and techno-economic modeling integrated in every chapter, this book is essential to understanding the development of affordable energy systems globally, particularly from renewable resources.
With a detailed overview and a comparison of hybrid energy systems used in different regions, as well as innovative hybrid energy system designs covered, this book is useful for practicing power and energy engineers needing answers for what factors to consider when modeling a hybrid energy system and what tools are available to model hybrid systems.

Bone Remodeling Process: Mechanics, biology, and numerical modeling

 Rabeb Ben Kahla, Abdelwahed Barkaoui

Bone Remodeling Process: Mechanics, Biology, and Numerical Modeling provides a literature review. The first part of the book discusses bones in a normal physiological condition, bringing together the involved actors and factors reported over the past two decades, and the second discusses pathological conditions, highlighting the attack vectors of each bone disease. The third part is devoted to the mathematical descriptions of bone remodeling, formulated to develop models able to provide information that is not amenable to direct measurement, while the last part focuses on models using the finite element method in investigating bone biomechanics.

This book creates an overall image of the complex communication network established between the diverse remodeling actors, based on overwhelming control evidence revealed over recent years, as well as visualizes the remodeling defects and possible treatments in each case. It also regroups the models allowing readers to analyze and assess bone mechanical and biological properties. This book details the cellular mechanisms allowing the bone to adapt its microarchitecture to the requirements of the human body, which is the main issue in bone biology and presents the evolution of mathematical modeling used in a bone computer simulation.