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https://hdl.handle.net/2440/35007
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Type: | Journal article |
Title: | Stokes flow in a mixer with changing geometry |
Author: | Finn, Matthew David Cox, Stephen Michael |
Citation: | Journal of Engineering Mathematics, 2001; 41 (1):75-99 |
Publisher: | Kluwer Academic |
Issue Date: | 2001 |
ISSN: | 0022-0833 |
School/Discipline: | School of Mathematical Sciences : Applied Mathematics |
Statement of Responsibility: | Matthew D. Finn and Stephen M. Cox |
Abstract: | A slow-flow mixing device that mimics a natural mixing technique is described. Analytical, numerical and experimental results are presented for the `translating, rotating mixer', which illustrate its mixing effectiveness. In large part, this effectiveness is due to the fact that its geometry changes with time, a feature rare in mathematically tractable slow-flow mixing models. The mixer consists of a large circular cylinder filled with fluid, which is stirred by a circular cylindrical `rod' that moves around in the fluid. The stirring rod may also rotate about its axis. The velocity field is calculated explicitly for the mixer, and its mixing action is simulated numerically. Through a complex-variable formulation of the problem, the energy input required for various mixing protocols may readily be determined, and in turn suggestions for efficient mixing using the device are offered. To validate the analytical and numerical results, tracer-advection experiments are performed, using a simple experimental rig and a variety of mixing protocols, providing encouraging agreement with numerical simulation. |
Keywords: | Stokes flow Laminar mixing Biharmonic equation Image systems |
Description: | The original publication can be found at www.springerlink.com © 2001 Kluwer Academic Publishers |
DOI: | 10.1023/A:1011840630170 |
Appears in Collections: | Applied Mathematics publications |
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