Machine learning strategies for path-planning microswimmers in turbulent flows

We develop an adversarial-reinforcement learning scheme for microswimmers in statistically homogeneous and isotropic turbulent fluid flows, in both two (2D) and three dimensions (3D). We show that this scheme allows microswimmers to find non-trivial paths, which enable them to reach a target on aver...

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Published in:arXiv.org 2021-05
Main Authors: Alageshan, Jaya Kumar, Verma, Akhilesh Kumar, Bec, Jérémie, Pandit, Rahul
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Computer simulation
Fluid flow
Incompressible flow
Machine learning
Path planning
Response time
Vorticity
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Verma, Akhilesh Kumar
Bec, Jérémie
Pandit, Rahul
description We develop an adversarial-reinforcement learning scheme for microswimmers in statistically homogeneous and isotropic turbulent fluid flows, in both two (2D) and three dimensions (3D). We show that this scheme allows microswimmers to find non-trivial paths, which enable them to reach a target on average in less time than a naive microswimmer, which tries, at any instant of time and at a given position in space, to swim in the direction of the target. We use pseudospectral direct numerical simulations (DNSs) of the 2D and 3D (incompressible) Navier-Stokes equations to obtain the turbulent flows. We then introduce passive microswimmers that try to swim along a given direction in these flows; the microswimmers do not affect the flow, but they are advected by it.
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subjects Computational fluid dynamics
Computer simulation
Fluid flow
Incompressible flow
Machine learning
Path planning
Response time
Vorticity
title Machine learning strategies for path-planning microswimmers in turbulent flows
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