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- W4308355621 abstract "In this work we investigate the dynamics of the number-density fluctuations of a dilute suspension of active particles in a linear viscoelastic fluid. We propose a model for the frequency-dependent diffusion coefficient of the active particles which captures the effect of rotational diffusion on the persistence of their self-propelled motion and the viscoelasticity of the medium. Using fluctuating hydrodynamics, the linearized equations for the active suspension are derived, from which we calculate its dynamic structure factor and the corresponding intermediate scattering function. For a Maxwell-type rheological model, we find an intricate dependence of these functions on the parameters that characterize the viscoelasticity of the solvent and the activity of the particles, which can significantly deviate from those of an inert suspension of passive particles and of an active suspension in a Newtonian solvent. In particular, in some regions of the parameter space we uncover the emergence of oscillations in the intermediate scattering function at certain wave numbers which represent the hallmark of the nonequilibrium particle activity in the dynamical structure of the suspension and also encode the viscoelastic properties of the medium." @default.
- W4308355621 created "2022-11-11" @default.
- W4308355621 creator A5027273456 @default.
- W4308355621 creator A5036412382 @default.
- W4308355621 creator A5085677498 @default.
- W4308355621 date "2022-11-04" @default.
- W4308355621 modified "2023-10-14" @default.
- W4308355621 title "Nonequilibrium dynamical structure factor of a dilute suspension of active particles in a viscoelastic fluid" @default.
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