👉 A frequency fluid, also known as a frequency variable fluid or frequency-dependent fluid, is a type of fluid whose properties, such as viscosity, density, or thermal conductivity, change in response to the frequency of an applied external force or field. This phenomenon is observed in various materials, including polymers, colloids, and certain biological fluids, where the molecular or structural response to oscillating forces leads to dynamic changes in the fluid's behavior. For instance, in a frequency-dependent fluid, applying a high-frequency oscillation might temporarily reduce viscosity, allowing for easier flow, whereas a low-frequency oscillation could enhance viscosity, increasing resistance to flow. These changes are crucial in applications ranging from soft robotics and adaptive materials to biomedical devices and energy harvesting technologies.
