Coarse Graining Nonisothermal Microswimmer Suspensions
We investigate coarse-grained models of suspended self-thermophoretic microswimmers. Upon heating, the Janus spheres, with hemispheres made of different materials, induce a heterogeneous local solvent temperature that causes the self-phoretic particle propulsion. Starting from molecular dynamics sim...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-07-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2021.655838/full |
| _version_ | 1818891289628770304 |
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| author | Sven Auschra Dipanjan Chakraborty Gianmaria Falasco Richard Pfaller Klaus Kroy |
| author_facet | Sven Auschra Dipanjan Chakraborty Gianmaria Falasco Richard Pfaller Klaus Kroy |
| author_sort | Sven Auschra |
| collection | DOAJ |
| description | We investigate coarse-grained models of suspended self-thermophoretic microswimmers. Upon heating, the Janus spheres, with hemispheres made of different materials, induce a heterogeneous local solvent temperature that causes the self-phoretic particle propulsion. Starting from molecular dynamics simulations that schematically resolve the molecular composition of the solvent and the microswimmer, we verify the coarse-grained description of the fluid in terms of a local molecular temperature field, and its role for the particle’s thermophoretic self-propulsion and hot Brownian motion. The latter is governed by effective nonequilibrium temperatures, which are measured from simulations by confining the particle position and orientation. They are theoretically shown to remain relevant for any further spatial coarse-graining towards a hydrodynamic description of the entire suspension as a homogeneous complex fluid. |
| first_indexed | 2024-12-19T17:38:27Z |
| format | Article |
| id | doaj.art-3511002d15924f9e844694a098b5dcdb |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-19T17:38:27Z |
| publishDate | 2021-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-3511002d15924f9e844694a098b5dcdb2022-12-21T20:12:16ZengFrontiers Media S.A.Frontiers in Physics2296-424X2021-07-01910.3389/fphy.2021.655838655838Coarse Graining Nonisothermal Microswimmer SuspensionsSven Auschra0Dipanjan Chakraborty1Gianmaria Falasco2Richard Pfaller3Klaus Kroy4Institute for Theoretical Physics, University of Leipzig, Leipzig, GermanyDepartment of Physics, Indian Institute of Science Education and Research, Mohali, IndiaDepartment of Physics and Materials Science, University of Luxembourg, Luxembourg, LuxembourgInstitute for Theoretical Physics, University of Leipzig, Leipzig, GermanyInstitute for Theoretical Physics, University of Leipzig, Leipzig, GermanyWe investigate coarse-grained models of suspended self-thermophoretic microswimmers. Upon heating, the Janus spheres, with hemispheres made of different materials, induce a heterogeneous local solvent temperature that causes the self-phoretic particle propulsion. Starting from molecular dynamics simulations that schematically resolve the molecular composition of the solvent and the microswimmer, we verify the coarse-grained description of the fluid in terms of a local molecular temperature field, and its role for the particle’s thermophoretic self-propulsion and hot Brownian motion. The latter is governed by effective nonequilibrium temperatures, which are measured from simulations by confining the particle position and orientation. They are theoretically shown to remain relevant for any further spatial coarse-graining towards a hydrodynamic description of the entire suspension as a homogeneous complex fluid.https://www.frontiersin.org/articles/10.3389/fphy.2021.655838/fullhomogenisationactive particlesmicroswimmershot brownian motionnon-isothermal molecular dynamics simulations |
| spellingShingle | Sven Auschra Dipanjan Chakraborty Gianmaria Falasco Richard Pfaller Klaus Kroy Coarse Graining Nonisothermal Microswimmer Suspensions Frontiers in Physics homogenisation active particles microswimmers hot brownian motion non-isothermal molecular dynamics simulations |
| title | Coarse Graining Nonisothermal Microswimmer Suspensions |
| title_full | Coarse Graining Nonisothermal Microswimmer Suspensions |
| title_fullStr | Coarse Graining Nonisothermal Microswimmer Suspensions |
| title_full_unstemmed | Coarse Graining Nonisothermal Microswimmer Suspensions |
| title_short | Coarse Graining Nonisothermal Microswimmer Suspensions |
| title_sort | coarse graining nonisothermal microswimmer suspensions |
| topic | homogenisation active particles microswimmers hot brownian motion non-isothermal molecular dynamics simulations |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2021.655838/full |
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