Eulerian simulation of complex suspensions and biolocomotion in three dimensions

Journal Article · 30 December 2021 · Proceedings of the National Academy of Sciences of the United States of America

DOI: https://doi.org/10.1073/pnas.2105338118 · OSTI ID:1837778

Lin, Yuexia Luna  ^[1]; Derr, Nicholas J.  ^[1]; Rycroft, Chris H.  ^[2]

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1. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138,
2. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138,, Mathematics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720

Significance Fluid–structure interactions are ubiquitous in many natural and man-made environments. They are difficult to study analytically, and therefore accurate and flexible computational methods are an indispensable tool in the field. Typically, fluids are simulated with a fixed background computational mesh, whereas a solid is simulated with a mesh that moves with it, making it challenging to couple the two. Here we develop a three-dimensional computational method where both fluid and solid can be represented on a fixed computational grid, which simplifies the coupling between the two phases considerably. Our method can simulate scenarios that are difficult to do with other methods, such as complex suspensions containing soft particles that are both heavier and lighter than the fluid.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1837778
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 1 Vol. 119; ISSN 0027-8424
• Publisher: Proceedings of the National Academy of SciencesCopyright Statement
• Country of Publication: United States
• Language: English