Adrian Bejan's Blog, page 8

Adrian Bejan I Discipline, from Convection

This lecture by Adrian Bejan explores the discipline of convection, mainly focusing on its principles and significance in predicting heat transfer through fluid motion. He emphasizes the importance of understanding the fundamental laws of convection for practical applications in various fields, comparing it to military discipline and discussing natural and forced convection. The lecture outlines the structure of the course, which includes laminar and turbulent flows and the complexities of multi-phase interactions in convection.

Adrian Bejan I Scale Analysis, from Convection

The video discusses the concept of scale analysis to heat transfer, particularly in processes like immersion heating and cooling. It introduces how to simplify complex partial differential equations into algebraic expressions by focusing on order of magnitude equality. Adrian Bejan uses cooking examples, such as boiling eggs and quenching steel, to illustrate how to predict thermal penetration times and the impacts of scale on such processes.

Adrian Bejan I Energy Conservation, from Convection

In this lecture, Adrian Bejan discusses energy conservation principles in convection, including mass conservation and momentum equations, emphasizing the relationship between various thermophysical properties. The talk presents a detailed exploration of energy equations, thermodynamics, and the implications of fluid properties while highlighting the contributions of historical figures in developing these concepts.

Adrian Bejan I Momentum Conservation, from Convection

In this video, Adrian Bejan discusses momentum conservation principles, expanding on the concepts through vector projections and forces' role in a control volume. He critiques traditional understandings of physics as taught, particularly Newton's laws, clarifying that Newton's contributions were more conceptual than formulaic. The lecture explains various forces and introduces fundamental equations that define momentum conservation in two dimensions while also touching on the relationship between pressure and flow dynamics.

Adrian Bejan I Mass Conservation, from Convection

In this lecture, Adrian Bejan discusses the fundamental principles of mass conservation and momentum in convection phenomena. He emphasizes the importance of understanding these principles for macroscopic physical systems, providing insights into mass and energy flow. The lecture includes explanations of conservation equations, scaling analysis, and relevance to various scientific and engineering applications.

Adrian Bejan I The Problem, from Convection

This lecture introduces the principles of convection heat transfer, distinguishing it from other forms of energy transfer, such as conduction and radiation. It emphasizes the importance of understanding the underlying concepts and vocabulary related to heat transfer and explores historical figures like Benjamin Thompson who contributed to these understandings. The lecture also discusses the significance of studying convection for engineering applications and innovation.

Duke University Professor Adrian Bejan Receives ASME Medal

Adrian Bejan, Ph.D., the J.A. Jones Distinguished Professor of Mechanical Engineering at Duke University in North Carolina, has been named the 2024 recipient of The American Society of Mechanical Engineers (ASME) Medal. The award, established in 1920, is the highest award that the Society can bestow and recognizes “eminently distinguished engineering achievement.” ASME will present Bejan with the medal at its International Mechanical Engineering Congress & Exposition (IMECE) in Portland, Ore., in November.

Bejan is honored for unprecedented creativity, breadth, and permanent impact on engineering; for developments in the new science of energy, motion, form, and evolution; and for building bridges to design in biological, geophysical, and sociological systems.

An eminent scholar in his field, Bejan is credited with several groundbreaking developments. He unified thermodynamics with heat transfer, fluid dynamics, and the science of form (i.e., flow configuration, image, design), as a counterweight to the doctrine of reductionism; discovered, taught, and applied the Constructal Law of evolution in nature; and brought together biologists, physicists, engineers, sociologists, philosophers, economists, managers, and athletes with creative books for the public, including “Design in Nature” (2012), “The Physics of Life” (2016), “Freedom and Evolution” (2020), and “Time and Beauty” (2022). His influential work and prolific publication record have earned him 18 honorary doctorates from 11 countries. He holds a position among the top 0.01% of most-cited and impactful scientists, is the sixth most impactful scholar in mechanical engineering worldwide, and the 11th across all engineering disciplines, according to the citations impact database in PLOS Biology.

Bejan is the recipient of many prior honors. In 2018, he was awarded the Benjamin Franklin Medal conferred by the Franklin Institute in Philadelphia. He is a Nautilus Books Award winner for “Time and Beauty,” the winner of the Kimberly-Clark distinguished lectureship from the International Society of Porous Media, a recipient of the Lifetime Achievement Award from the International Association of Green Energy, and from ASME, a prior awardee of the Ralph Coats Roe Medal, the Edward F. Obert Award, and the Max Jakob Memorial Award in conjunction with AIChE. He was named Knight of the French Order of Academic Palms in 2020. Earlier this year, he was awarded the Capers and Marion McDonald Award for Excellence in Teaching and Research from Duke University.

Bejan earned his B.S., M.S., and Ph.D. degrees at the Massachusetts Institute of Technology in 1971, 1972, and 1975, respectively.

About ASME

ASME helps the global engineering community develop solutions to real world challenges. Founded in 1880 as the American Society of Mechanical Engineers, ASME is a not-for-profit professional organization that enables collaboration, knowledge sharing, and skill development across all engineering disciplines, while promoting the vital role of the engineer in society. ASME codes and standards, publications, conferences, continuing education, and professional development programs provide a foundation for advancing technical knowledge and a safer world. In 2020, ASME formed the International Society of Interdisciplinary Engineers (ISIE) II & III LLC, a new for-profit subsidiary to house business ventures that will bring new and innovative products, services, and technologies to the engineering community. For more information, visit www.asme.org.

✒️ Soruce: https://www.asme.org/about-asme/media-inquiries/press-releases/duke-university-professor-adrian-bejan-receives-asme-medal

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The Physics Law Behind Any Successful System

If you want to truly understand how society works, you need to think of it as a flow system, one that follows the rules of the Constructal Law, which I formulated in 1995:

“For a finite-size system to persist in time (to live), it must evolve with freedom such that it provides easier and greater access to what flows.”

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Constructal Law Inspires Berlin Art Exhibit

Inspired by the constructal law put forth by Adrian Bejan (MEMS), “The Path of Least Resistance” is an art exhibition in Berlin, Germany that opened on September 9. Created by Gabriela Torres Ruiz, the exhibit explores flow patterns that determine the structure of the entire universe that can be found in rivers, neural networks, lightning, the lungs, the growth of plants and social dynamics. The exhibit runs through October 2 and was developed in cooperation with the Berlin Medizinhistorisches Museum der Charité, the Berlin Museum für Natural History, and with the support of the Volkart Foundation, Winterthur, Switzerland.