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Clearing out a maze: A model of chemotactic motion in porous media

Schilling, Tanja and Voigtmann, Thomas (2017) Clearing out a maze: A model of chemotactic motion in porous media. Journal of Chemical Physics, 147, p. 214905. American Institute of Physics (AIP). doi: 10.1063/1.4999485. ISSN 0021-9606.

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We study the anomalous dynamics of a biased hungry (or greedy) random walk on a percolating cluster. The model mimics chemotaxis in a porous medium: In close resemblance to the 1980s arcade game PAC-MAN(R) , the hungry random walker consumes food, which is initially distributed in the maze, and biases its movement towards food-filled sites. We observe that the mean-squared displacement of the process follows a power law with an exponent that is different from previously known exponents describing passive or active microswimmer dynamics. The change in dynamics is well described by a dynamical exponent that depends continuously on the propensity to move towards food. It results in slower differential growth when compared to the unbiased random walk.

Item URL in elib:https://elib.dlr.de/116815/
Document Type:Article
Title:Clearing out a maze: A model of chemotactic motion in porous media
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schilling, TanjaUniversität FreiburgUNSPECIFIEDUNSPECIFIED
Date:7 December 2017
Journal or Publication Title:Journal of Chemical Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 214905
Publisher:American Institute of Physics (AIP)
Keywords:chemotaxis, percolation, anomalous diffusion
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Material Design and New Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Voigtmann, Dr.rer.nat. Thomas
Deposited On:11 Dec 2017 07:38
Last Modified:27 Nov 2023 11:54

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