NDLI: Thermodynamic Formulation of the Constructal Law

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Bejan, A. Lorente, S.
Copyright Year	2003
Abstract	In this paper we develop an analytical and graphical formulation of the constructal law of maximization of flow access in systems with heat and fluid flow irreversibilities and freedom to change configuration. The flow system has global objective (e.g., minimization of global flow resistance) and global constraints (e.g., overall size, and total duct volume). The infinity of possible flow structures occupies a region of the two-dimensional domain of “global performance versus freedom to morph.” This region of “nonequilibrium” flow structures is bounded by a line representing the best flow structures that are possible when the freedom to morph is limited. The best of all such structures are the “equilibrium” structures: here the performance level is the highest, and it does not change even though the flow architecture continues to change with maximum freedom. The universality of this graphical and analytical presentation is illustrated with examples of flow structures from three classes: flow between two points, flow between a circle and its center, and flow between one point and an area. In sum, this paper presents an analytical and graphical formulation of the constructal principle of thermodynamic optimization of flow architecture under global constraints. The place of this new and self-standing principle in the greater framework of thermodynamics is outlined.
Sponsorship	Advanced Energy Systems Division
Starting Page	163
Ending Page	172
Page Count	10
File Format	PDF
ISBN	0791837084
DOI	10.1115/IMECE2003-41167
Volume Number	Advanced Energy Systems
Conference Proceedings	ASME 2003 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2003-11-15
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Thermodynamics Configuration Constructal theory Fluid flow Heat flow Morphing Equilibrium flow architecture Heat Fluid dynamics Ducts Equilibrium (physics) Flow (dynamics) Optimization
Content Type	Text
Resource Type	Article

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