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Description
This study systematically examines the physical parameters influencing the macroscopic pattern formation in a ferrofluid under a magnetic field. Our experiments focus on spike height variations and Rosensweig instabilities within the context of magnetorheological effects. The home-built apparatus consists of a permanent neodymium magnet attached in a set up developed using the principle of hydraulics. It is observed that despite the apparent randomness, the Rosensweig instabilities display deterministic patterns. Varying viscosities of the same ferrofluid, achieved through carrier fluid evaporation, reveal a consistent trend, specifically, a decrease in response field and an increase in spike height. This work provides the capability of predicting the ferrofluid spikes formation under a given field strength. Further, the formed patterns demonstrate the three-dimensional distribution of magnetic field lines, enhancing our understanding of spatial dynamics of the ferrofluid system.
