Typical dampers and energy harvesters based on characteristics of ferrofluids

Abstract Ferrofluids are a type of nanometer-scale functional material with fluidity and superparamagnetism. They composed ferromagnetic particles, surfactants, base liquids. The main characteristics ferrofluids include magnetization, the magnetoviscous effect, levitation characteristics. There many mature commercial ferrofluid damping applications based on these that widely used in numerous fields. Furthermore, some studies such as those related to vibration energy harvesters biomedical devices still laboratory stage. This review paper summarizes typical dampers harvesting systems from 1960s present, including viscous dampers, inertia tuned magnetic fluid (TMFDs), harvesters. In particular, it focuses TMFDs because they have been hottest research topics field recent years. also proposes novel damper achieves conversion improves efficiency attenuation. Finally, we discuss potential challenges development future research.