Document Type

Article

Publication Date

1-2017

Publication Title

The Journal of the Acoustical Society of America

Volume

141

Issue

1

Publisher

Nature Publishing

Abstract

Removing drops from an air flow can be challenging, particularly, for small drops. Herein a method for demisting is presented that employs ultrasonics to force small drops to combine. Specifically, a cylindrical ultrasonic standing wave field is established in a tube, forming pressure nodes that take the form of cylinders located within the tube and having the same axis as the tube. Droplets are driven toward these pressure nodes by the acoustic radiation force, forcing smaller drops to combine to form larger drops, which eventually fall due to gravity, thereby demisting the flow. Experiments presented herein show that, for the setup employed, this method can remove a fraction of drops that approaches 0.8 and that the improvement due to ultrasonics, compared to the case without ultrasonics, is as large as 2.8. The effect of air flow rate and power is investigated.

Comments

This article has been published in the Journal of the Acoustical Society of America. Please find the published version here (note that a subscription is necessary to access this version):

http://asa.scitation.org/doi/10.1121/1.4973689

Nature Publishing holds the copyright in this article.

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