Josua Meyer (editor) - The Art of Measuring in the Thermal Sciences

Series Editor:

Afshin J. Ghajar

Regents Professor, School of Mechanical and Aerospace Engineering, Oklahoma State University

A SERIES OF REFERENCE BOOKS AND TEXTBOOKS

Engineering Heat Transfer, Third Edition

William S. Janna

Conjugate Problems in Convective Heat Transfer

Abram S. Dorfman

Thermal Measurements and Inverse Techniques

Helcio R.B. Orlande, Olivier Fudym, Denis Maillet, and Renato M. Cotta

Introduction to Thermal and Fluid Engineering

Allan D. Kraus, James R. Welty, and Abdul Aziz

Advances in Industrial Heat Transfer

Alina Adriana Minea, Editor

Introduction to Compressible Fluid Flow, Second Edition

Patrick H. Oosthuizen and William E. Carscallen

District Cooling: Theory and Practice

Alaa A. Olama

Advances in New Heat Transfer Fluids

From Numerical to Experimental Techniques

Alina Adriana Minea, Editor

Finite Difference Methods in Heat Transfer

M. Necati ziik, Helcio R.B. Orlande, Marcelo J. Colao, and Renato M. Cotta

Convective Heat and Mass Transfer, Second Edition

S. Mostafa Ghiaasiaan

The Art of Measuring in Thermal Sciences

Josua P. Meyer and Michel De Paepe

Edited by

Josua P. Meyer and Michel De Paepe

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First edition published 2021

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ISBN: 978-0-367-19290-7 (hbk)

ISBN: 978-0-429-20162-2 (ebk)

Typeset in Palatino

by codeMantra

We are proud to present our first book resulting from years of cooperation. The idea for this book emerged from the sabbatical stay of Michel De Paepe at the University of Pretoria with Josua P. Meyer in 2018.

This book is aimed at providing scholars, students, and people from industry a scholarly, state-of-the-art overview of good practices for conducting correct and sound measurements in thermal sciences. All the material in the book is original, was written by academic experts in the field, and has not been published before. Every chapter was peer-reviewed for originality by independent reviewers, who are distinguished subject specialists in the field of the relevant chapter.

It is a guide for people who want to conduct advanced thermal experiments. The types of experiments discussed in the book are common in modern research and the development of thermal systems in the industries of energy generation, transport, manufacturing, mining, processes, HVAC, biomedical engineering, etc. Most of what we currently know about thermal sciences has been learnt by observation and proper data reduction (deduction).

These days, many thermal science problems are being solved numerically on large grids using the tools of computational fluid dynamics. Even for these computerized simulations of physical systems, the numerical simulations in most cases depend on experimental data for validation and comparison purposes. Therefore, there is a big need for good and accurate data with known uncertainties. Since the introduction of digital measurement equipment, a lot has changed in the common practice of conducting measurements. Computers have changed the way and the amount of data we process. The possibilities and accuracies have grown much due to the advancement of electronics, but so has the complexity of our work.

Little information is found in the recent literature on how to conduct scientifically sound and correct measurements. Institutional memory and practices are being transferred from one person to another in laboratories. At conferences and in archival journals, little attention is given to this kind of craftsmanship and at most, the uncertainties and calibration techniques are reported. Fortunately, most scholarly journals require the reporting of equipment errors and uncertainties. However, this information is normally provided so succinctly that it is challenging to learn from it.

This book brings together the expertise of several research teams of the scientific thermal science community. It gives a unique overview and insight into advanced measurement techniques and systems, which are normally never published. The book goes into the fundamentals where possible and focuses on advanced measurement techniques currently used in thermal systems. It also highlights the challenges and future research opportunities for measuring practices.

We are grateful to our colleagues in the thermal engineering research field for sharing their knowledge and expertise. We consider ourselves blessed to have been able to work at and with institutes of this high level. But mostly we need to thank our students for teaching us, by hard work in our laboratories, how to make measurements come to a good end.

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Josua P. Meyer is a Professor, Head of the Department of Mechanical and Aeronautical Engineering, and Chair of the School of Engineering in the Faculty of Engineering, Built Environment and Information Technology. His area of research is convective heat transfer, which relies on the engineering sciences of heat transfer, fluid mechanics, and thermodynamics. He and his students and colleagues have made it possible to predict the heat transfer characteristics in the previously unknown transitional flow regime. He has published more than 800 articles, conference papers, and book chapters in the field of thermal sciences and has successfully supervised more than 100 PhD and MSc students. He established the Clean Energy Research Group at the University of Pretoria, which now has 40 full-time postgraduate students and 13 staff members. The group members have developed, designed, and built more than ten unique, state-of-the-art experimental setups, which are being used for leading-edge heat transfer research. No other similar experimental setup exists in the world. The group conducts joint research and publishes with scholars at EPFL, MIT, Ghent, Duke, and INSA Toulouse.