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 (V1) and the negative (V2) 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, V1increases with the size of the ferrofluid drop because of stronger magnetization. On the contrary, V2is more prominent for a smaller drop, whose stretch is less significant. As a result, the ratio of |V1= V2| 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.
|Number of pages||9|
|Publication status||Published - 1 Jan 2016|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Electrical and Electronic Engineering