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Novel lattice Boltzmann method for simulation of strongly shear thinning viscoelastic fluids

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008307
URN to cite this document: urn:nbn:de:bvb:703-epub-8307-8

Title data

Kellnberger, Richard ; Jüngst, Tomasz ; Gekle, Stephan:
Novel lattice Boltzmann method for simulation of strongly shear thinning viscoelastic fluids.
In: International Journal for Numerical Methods in Fluids. Vol. 97 (2025) Issue 2 . - pp. 164-187.
ISSN 1097-0363
DOI der Verlagsversion: https://doi.org/10.1002/fld.5335

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Project information

Project title:
Project's official title
Project's id
SOP_Bioprint
13XP5071B
TRR 225 Biofabrication
326998133

Project financing: Bundesministerium für Bildung und Forschung
Deutsche Forschungsgemeinschaft

Abstract

Abstract The simulation of viscoelastic liquids using the Lattice–Boltzmann method (LBM) in full three dimensions remains a formidable numerical challenge. In particular the simulation of strongly shear-thinning fluids, where the ratio between the high-shear and low-shear viscosities is large, is often prevented by stability problems. Here we present a novel approach to overcome this issue. The central idea is to artificially increase the solvent viscosity which allows the method to benefit from the very good stability properties of the LBM. To compensate for this additional viscous stress, the polymer stress is reduced by the same amount. We apply this novel method to simulate two realistic cell carrier fluids, methyl cellulose and alginate solutions, of which the latter exhibits a viscosity ratio exceeding 10,000.

Further data

Item Type: Article in a journal
Keywords: biofluidics; immersed boundary; laminar flow; lattice Boltzmann; microfluidics; non-Newtonian; stability
DDC Subjects: 500 Science > 530 Physics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Theoretical Physics VI - Simulation and Modelling of Biofluids
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-8307-8
Date Deposited: 14 Mar 2025 06:56
Last Modified: 17 Mar 2025 09:55
URI: https://epub.uni-bayreuth.de/id/eprint/8307

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