2025/06/18 by Mohammad Parsa Rezaei, Rezaei, Mohammad Parsa, Grzegorz Kudra +7
Chemical Engineering · Engineering · #Chaotic Dynamics (nlin.CD) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Vibration Analysis #Granular flow and fluidized beds #Rheology and Fluid Dynamics Studies
paper · pdf · doi:10.48550/arxiv.2506.15431
openalex publication_date 2025/06/18 · openalex created_date 2025/10/19 · openalex updated_date 2026/07/28
Shear-thickening fluids (STFs) become more viscous under shear stress, which makes them useful for many engineering and scientific applications. However, their behavior under normal forces, especially when these forces are applied harmonically, is less understood. Here, we examine the dynamic response of STFs under harmonic excitation. Our experimental setup features an unbalanced rotor attached to a vibrating plate submerged in an STF-filled container. We monitored the rotor's speed, the system's displacement, and the STF force. Data from experiments without STF were used to identify system parameters, and measurements of the STF force revealed the dynamic nature of the STF force. By comparing responses with and without STF, we identified three regions of behavior: in the pre-resonance region, the STF force is negligible; at resonance, it acts as a significant damping force; and in the post-resonance region, it behaves like an on-off force. Overall, the STF effectively reduces resonance amplitudes. These results can inform the design of complex structures incorporating STFs.