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Technical Briefs

Experimental Investigation of the Use of Synthetic Jets for Mixing in Vessels

[+] Author and Article Information
Mushtak Al-Atabi

 Taylor′s University, School of Engineering No 1 Jalan Taylor’s, 47500 Subang Jaya Selangor DE, Malaysia e-mail: mushtak.t@taylors.edu.my

J. Fluids Eng 133(9), 094503 (Sep 12, 2011) (4 pages) doi:10.1115/1.4004941 History: Received August 15, 2010; Revised August 18, 2011; Published September 12, 2011; Online September 12, 2011

Mixing is an important process in various industries. Different designs have been suggested in order to reduce the local shear rates in mechanically stirred mixing vessels, also known as continuously stirred tank reactors, in order to account for the mixing requirements for sensitive materials such as biological materials and biofluids where the high shear rate may damage the sensitive materials. This paper reports on the development of a continuously stirred tank reactor that can be used to achieve a variety of mixing assignments. This mixing is achieved using synthetic jets. The mixing performance was assessed using flow visualization techniques. The effects of fluid viscosity on mixing time were investigated. The results are very encouraging and are suggestive that the use of synthetic jets in mixing is a viable alternative to the conventional methods of mixing in vessels.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of the development of a typical synthetic jet

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Figure 2

Experimental setup

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Figure 3

Image processing sequence

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Figure 4

Mixing using synthetic jet in a cylindrical vessel. Numbers show time in seconds.

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Figure 5

Coefficient of variance versus mixing time for distilled water

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Figure 6

Effect of fluid viscosity (concentration of glycerine) on the mixing time

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