Preface

Chapter 10 **Unsteady Mixed Convection from Two Isothermal Semicircular**

Chapter 11 **Computational Modeling of Vehicle Radiators Using Porous**

Barbaros Çetin, Kadir G. Güler and Mehmet Haluk Aksel

Erick Salcedo, César Treviño, Juan C. Cajas and Lorenzo Martínez-

**Cylinders in Tandem Arrangement 221**

Suástegui

**VI** Contents

**Medium Approach 243**

Presenting contributions from world-renowned academics and researchers in the field of heat exchangers, this book covers research and development in three major fundamental areas, which include design, experiments, and simulations. This book consists of 11 chap‐ ters, which are organized following the order of the mentioned areas. Except the introducto‐ ry chapter, which overviews the content of the book, the first few chapters are mainly related to the design of heat exchangers; the next couple of chapters deals with experimental studies followed by a few numerical works in the field.

This book starts with an introductory chapter overviewing fundamental aspects of heat ex‐ changers and also highlighting all the contributions of this book.

The second chapter covers the design methods as well as theoretical developments of twofluid heat exchangers, namely, recuperator and regenerators.

The third chapter presents design of heat exchange surface in agitated vessels and summa‐ rizes related literature studies. A numerical analysis was done to project the heat transfer surface area in an agitated vessel.

Topology optimization with special focus on the design of heat exchangers is reported in the fourth chapter. It also provides a comprehensive chronological review of available literature.

The fifth chapter reports a new and simplified multiperiod synthesis approach for designing flexible heat exchanger networks. It also presents comparisons of results of this new ap‐ proach with those in the literature.

The sixth chapter highlights various basic aspects related to the thermal design of gas tur‐ bine blades and also discusses examination of several heat transfer technologies.

An extensive study on direct contact heat exchangers is reported in the seventh chapter. It also introduces two new techniques: one for quantifying the efficiency of multiphase mixing and the other for accurate estimation of the mixing time in these exchangers.

The eighth chapter describes a method for measuring the transient temperature of the flow‐ ing fluids in heat exchangers. It also demonstrates the applicability of this method by vali‐ dating with real experimental data.

A comprehensive review and description of the transient effectiveness methodology for ana‐ lyzing heat exchangers are presented in the ninth chapter. Novel transient effectiveness methodologies and two CFD compact modeling methodologies are also detailed in this chapter.

The tenth chapter reports a numerical study on unsteady mixed convection heat transfer from two isothermal semicircular cylinders in tandem arrangement inside a channel.

A computational modeling of vehicle radiators using porous medium approach is presented in the final chapter. A CFD analysis and results of a radiator are also demonstrated in this chapter.

This book is intended to be a useful source of information for researchers, postgraduate stu‐ dents, and academics, as well as designers and engineers working in the fields of heat ex‐ changers and related industries.

We would like to thank all the authors for their high-quality contributions and the publish‐ ing process manager for providing continuous support, which have made the completion of this book possible.

Finally, we would like to express our appreciation to our family members for their contin‐ ued support and patience during the preparation of this book.

> **S M Sohel Murshed and Manuel Matos Lopes** University of Lisbon,

Lisbon, Portugal

**Provisional chapter**
