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Mechanical Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

1993

Worcester Polytechnic Institute

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Paradigm Shift In Materials Processing - The Intelligent Processing Revolution, Diran Apelian Nov 1993

Paradigm Shift In Materials Processing - The Intelligent Processing Revolution, Diran Apelian

Mechanical Engineering Faculty Publications

During the last several decades, the importance of materials processing in the control of microstructure and materials properties has been recognized and, accordingly, the materials engineering community has dedicated much effort to studying the physics of the process. These endeavors have provided an understanding of the phenomena which are relevant. However, a paradigm shift is taking place in that the physics oriented approach to materials processing is being replaced by a control oriented approach. What is needed today is the ability to control the process and, thus, the trajectory of the controllable variables in a temporal space. Such a knowledge ...


A Low-Dimensional Model For Chaos In Open Fluid-Flows, David J. Olinger Aug 1993

A Low-Dimensional Model For Chaos In Open Fluid-Flows, David J. Olinger

Mechanical Engineering Faculty Publications

A forced Landau-Stuart equation is studied in order to derive a low-dimensional model describing the temporal behavior of a paradigm open flow, the two-dimensional forced cylinder wake. Numerical results from the model exhibit several characteristics of circle maps, and compare qualitatively to previous experimental results for an oscillating cylinder wake. The low-dimensional model is also shown to reduce to a circle map in the limit of small forcing amplitudes. Observation of circle map dynamics in the forced Landau-Stuart equation strengthens the conjecture that globally unstable fluid flows are amenable to a dynamical systems approach focusing on the study of low-dimensional ...