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Title:A novel pseudo-rigid body approach to the non-linear dynamics of soft micro-particles in dilute viscous flow
Authors:ID Wedel, Jana (Author)
ID Hriberšek, Matjaž (Author)
ID Ravnik, Jure (Author)
ID Steinmann, Paul (Author)
Files:.pdf 1-s2.0-S0021999124006259-main.pdf (2,18 MB)
MD5: 2B3E6D557B10E6DA5B01A33851400FDE
 
URL https://www.sciencedirect.com/science/article/pii/S0021999124006259?via%3Dihub
 
Language:English
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:We propose a novel, demonstrably effective, utmost versatile and computationally highly efficient pseudo-rigid body approach for tracking the barycenter and shape dynamics of soft, i.e. nonlinearly deformable micro-particles dilutely suspended in viscous flow. Pseudo-rigid bodies are characterized by affine deformation and thus represent a first-order extension to the kinematics of rigid bodies. Soft particles in viscous flow are ubiquitous in nature and sciences, prominent examples, among others, are cells, vesicles or bacteria. Typically, soft particles deform severely due to the mechanical loads exerted by the fluid flow. Since the shape dynamics of a soft particle - a terminology that shall here also include its orientation dynamics - also affects its barycenter dynamics, the resulting particle trajectory as a consequence is markedly altered as compared to a rigid particle. Here, we consider soft micro-particles of initially spherical shape that affinely deform into an ellipsoidal shape. These kinematic conditions are commensurate with i) the affine deformation assumption inherent to a pseudo-rigid body and ii) the celebrated Jeffery-Roscoe model for the traction exerted on an ellipsoidal particle due to creeping flow conditions around the particle. Without loss of generality, we here focus on non-linear hyperelastic particles for the sake of demonstration. Our novel numerical approach proves to accurately capture the particular deformation pattern of soft particles in viscous flow, such as for example tank-treading, thereby being completely general regarding the flow conditions at the macro-scale and, as an option, the constitutive behavior of the particle. Moreover, our computational method is highly efficient and allows straightforward integration into established Lagrangian tracking algorithms as employed for the point-particle approach to track rigid particles in dilute viscous flow.
Keywords:soft particles, pseudo-rigid bodies, Barycenter and shape dynamics, Lagrangian particle tracking
Publication status:Published
Publication version:Version of Record
Submitted for review:13.08.2024
Article acceptance date:23.08.2024
Publication date:09.09.2024
Publisher:Elsevier
Year of publishing:2024
Number of pages:24 str.
Numbering:Vol. 519, [article no.] 113377
PID:20.500.12556/DKUM-90755 New window
UDC:532:519.6
ISSN on article:1090-2716
COBISS.SI-ID:208073731 New window
DOI:10.1016/j.jcp.2024.113377 New window
Publication date in DKUM:19.09.2024
Views:0
Downloads:13
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
WEDEL, Jana, HRIBERŠEK, Matjaž, RAVNIK, Jure and STEINMANN, Paul, 2024, A novel pseudo-rigid body approach to the non-linear dynamics of soft micro-particles in dilute viscous flow. Journal of computational physics [online]. 2024. Vol. 519, no. 113377. [Accessed 14 March 2025]. DOI 10.1016/j.jcp.2024.113377. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=90755
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Record is a part of a journal

Title:Journal of computational physics
Shortened title:J. comput. phys.
Publisher:Academic Press, Elsevier
ISSN:1090-2716
COBISS.SI-ID:18272039 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0196-2020
Name:Raziskave v energetskem, procesnem in okoljskem inženirstvu

Licences

License:CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:http://creativecommons.org/licenses/by-nc/4.0/
Description:A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.

Secondary language

Language:Slovenian
Keywords:mehki delci, psevdotogo telo, baricenter, dinamika obliike, Lagrangevo sledenje delcev


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