標題: EFFECT OF SIZE AND STRETCH OF A MOVING FERROFLUID DROP ON INDUCED ELECTROMOTIVE FORCE
作者: Chen, Ching-Yao
Wang, Sheng-Yan
Wen, Chih-Yung
Jan, Cheng-Shiung
機械工程學系
Department of Mechanical Engineering
公開日期: 9-Jul-2016
摘要: Application for obtaining useful global features, e.g. the size and stretch of a moving ferrofluid drop by analyzing the characteristics of the induced electromotive force signal is demonstrated. These features are highly relevant to two maximum magnitudes in the electromotive force signal, e.g., the positive (V-1) and the negative (V-2) peak respectively induced when the drop enters and leaves the region covered by the induction coil. Favorable induction conditions of these two maximum magnitudes are opposite. In general, V-1 increases with the size of the ferrofluid drop because of stronger magnetization. On the contrary, V-2 is more prominent for a smaller drop, whose stretch is less significant. As a result, the ratio of vertical bar V-1/V-2 vertical bar monotonically increases with the, size of the ferrofluid drop. This finding suggests that the induced EMF signal can be used as a useful tool for quantifying the flow conditions, such as the size and stretch of moving ferrofluids.
URI: http://hdl.handle.net/11536/132925
ISSN: 0024-998X
期刊: Magnetohydrodynamics
Volume: 52
Issue: 3
起始頁: 369
結束頁: 377
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