Publikation: Observation and control of nonmonotonic recoils in a viscoelastic fluid
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2025
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Deutsche Forschungsgemeinschaft (DFG): 425217212
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European Union (EU): 101141477
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Physical Review Research. American Physical Society (APS). 2025, 7(3), 033084. eISSN 2643-1564. Verfügbar unter: doi: 10.1103/74nx-3t1h
Zusammenfassung
We experimentally study the relaxation dynamics of a colloidal particle in a micellar viscoelastic fluid following different driving protocols. When the particle is driven at constant velocity for a finite duration, its recovery to equilibrium is always monotonic. In contrast, altering the driving velocity during the protocol induces nonmonotonic relaxation. Our results are in quantitative agreement with the analytical solution of a minimal micromechanical model exhibiting only two distinct eigenmodes independent of the specific protocol. Notably, the model enables selective suppression of one or both modes—an effect confirmed experimentally. Because the model is broadly applicable to diverse viscoelastic fluids, our findings offer a general framework for tailoring relaxation dynamics in complex environments.
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VAIDYA, Salil, Lokesh CHINNAKANNA MURUGA, Juliana CASPERS, Matthias KRÜGER, Clemens BECHINGER, 2025. Observation and control of nonmonotonic recoils in a viscoelastic fluid. In: Physical Review Research. American Physical Society (APS). 2025, 7(3), 033084. eISSN 2643-1564. Verfügbar unter: doi: 10.1103/74nx-3t1hBibTex
@article{Vaidya2025-07-23Obser-74589,
title={Observation and control of nonmonotonic recoils in a viscoelastic fluid},
year={2025},
doi={10.1103/74nx-3t1h},
number={3},
volume={7},
journal={Physical Review Research},
author={Vaidya, Salil and Chinnakanna Muruga, Lokesh and Caspers, Juliana and Krüger, Matthias and Bechinger, Clemens},
note={Article Number: 033084}
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