This periodical edition includes peer-reviewed papers based on results of scientific research and engineering solutions in different areas of modern engineering science.

The 55th volume of "International Journal of Engineering Research in Africa" is compiled from the peer-reviewed manuscripts that present the research results in applied and fluid flow mechanics, computational analysis of heat and mass transfer processes, and investigation of the chaotic systems. This volume also considered the conceptual model for mitigating security vulnerabilities in smart grid electric energy distribution systems. The last research results in materials science and materials processing technologies, anti-corrosive coating, biodiesel synthesis, wastewater treatment technologies, and waste recycling are presented.

The 69th volume of the journal includes articles dedicated to the latest research results in properties and processing technologies of structural materials such as steel, polymers, and composites, analysis and design of sliding mode controllers and automation of centrifugal pumps, designing of geothermal heat exchangers, investigation of seismic behaviour of soil-based structure and analysis mechanics of river's sediments transfer in conditions of Wadi Skhirate, Morocco. The issue will be useful to specialists in mechanical engineering and construction.

The 62nd issue of the journal includes articles that describe the latest research results in materials science, including alloys and composites, solar energy concentrator design, power electronic engineering, building materials and level service analysis in the trading company.

This periodical edition includes peer-reviewed papers based on results of scientific research and engineering solutions in different areas of modern engineering science.

We are glad to provide our readers with the 43rd volume of International Journal of Engineering Research in Africa. This volume contains articles describing the research results in the fields of materials science, mechanical engineering and control, communication and power supply in communication, construction materials and technologies, water treatment and biodiesel production, industrial engineering. The articles will be useful for many engineers as well as for academic teachers and students majoring in these fields of engineering science.

This book comprises the select proceedings of the International Conference on Recent Trends in Developments of Thermofluids and Renewable Energy (TFRE 2020). The major topics covered include aerodynamics, alternate energy, bio fuel, bio heat transfer, computational fluid dynamics, control mechanism for constant power generation, and energy storage. The book also discusses latest developments in the fields of electric vehicles, hybrid power systems, and solar and renewable energy. Given the scope of its contents, this book will be useful for students, researchers, and professionals interested in the field of thermofluids and renewable energy resources.