2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Statistical physics of a driven nanocolloid coupled to a fluid heat bath

4 Jun 2019, 16:00
15m
ASB 10900 (Simon Fraser University)

ASB 10900

Simon Fraser University

Oral (Non-Student) / Orale (non-étudiant(e)) Symposia Day - Soft Matter Canada 2019 T4-1 Soft Matter PM-2 (DCMMP) | Matière molle PM-2 (DPMCM)

Speaker

Dr Vaibhav Thakore (Department of Applied Mathematics and Center for Advanced Materials and Biomaterials Research, Western University, London, Ontario Canada)

Description

Stochastic thermodynamics of mesoscale systems has been extensively studied using a dragged colloidal particle in a trap as a model system. The colloid is assumed to be a massive Brownian particle that undergoes stochastic motion governed by a Langevin-type equation. The Langevin description of the colloidal motion however completely ignores the hydrodynamic coupling of the colloid to the heat bath. Here, we present results for the stochastic thermodynamics of a dragged nanocolloid hydrodynamically coupled to a fluid heat bath. The motion of the colloidal nanoparticle is modeled using a hybrid fluctuating lattice Boltzmann (FLB) and molecular dynamics (MD) method that accounts for full nonlinear hydrodynamic effects [1, 2, 3]. The mesoscopic FLB-MD method employed in our simulations for the dragged colloidal particle in a trap allows testing of the fluctuation theorems in the truly transient regime of system evolution [1, 3]. FLB-MD also explicitly allows a study of the irreversible work done on the colloid-solvent system in the form of heat dissipation or entropy production in the fluid that has so far been impossible to achieve even in experiments.

References

  1. S. T. T. Ollila, C. Denniston, M. Karttunen, and T. Ala-Nissila,
    Fluctuating lattice-Boltzmann model for complex fluids, J. Chem.
    Phys. 134, 064902 (2011)
  2. M.M.T. Alcanzare, S.T.T. Ollila, V. Thakore, A.M. Laganapan, A.
    Videcoq, M. Cerbelaud, R. Ferrando, and T. Ala-Nissila, Shape and
    scale dependent diffusivity of colloidal nanoclusters and
    aggregates, Eur. Phys. J. Special Topics 225, 729–739 (2016)
  3. M. M. T. Alcanzare, V. Thakore, S. T. T. Ollila, M. Karttunen and T.
    Ala-Nissila, Controlled propulsion and separation of helical
    particles at the nanoscale, Soft Matter, 13, 2148 (2017)

Primary authors

Dr Vaibhav Thakore (Department of Applied Mathematics and Center for Advanced Materials and Biomaterials Research, Western University, London, Ontario Canada) Dr Carlos Mejia-Monasterio (Laboratory of Physical Properties TAGRALIA, Technical University of Madrid, Madrid, Spain) Dr Tapio Ala-Nissila (QTF Center of Excellence, Department of Applied Physics, Aalto University School of Science, Aalto, Espoo, Finland; Department of Physics, Brown University, Providence, Rhode Island, USA; Interdisciplinary Centre for Mathematical Modelling, Department of Mathematical Sciences, Loughborough University, Loughborough, UK) Dr Mikko Karttunen (Departments of Applied Mathematics and Chemistry and Center for Advanced Materials and Biomaterials Research, Western University, London, Ontario, Canada)

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