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New analytical laws and applications of interaction potentials with a focus on van der Waals attraction

Abstract

The paper aims to improve the efficiency of modeling interactions between slender deformable bodies that resemble the shape of fibers. Interaction potentials are modeled as inverse-power laws with respect to the point-pair distance, and the complete body-body potential is obtained by pairwise summation (integration). To speed-up integration, we consider the analytical preintegration of potentials between specific geometries such as disks, cylinders, rectangles, and rectangular prisms. Several exact new interaction laws are obtained, such as disk-infinite halfspace and (in-plane) rectangle-rectangle for an arbitrary exponent, and disk-disk and rectangle-rectangle for van der Waals attraction. To balance efficiency and accuracy, approximate laws are proposed for disk-disk, point-cylinder, and disk-cylinder interactions. Additionally, we have developed a novel formulation for the interaction between a spatial beam and an infinite halfspace. The application of the pre-integrated interaction potentials within the finite element method is illustrated via two examples.

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
APPLIED MATHEMATICAL MODELLING no. 145,
ISSN: 0307-904X
Language:
English
Publication year:
2025
Bibliographic description:
Borković A., Gfrerer M., Sauer R.: New analytical laws and applications of interaction potentials with a focus on van der Waals attraction// APPLIED MATHEMATICAL MODELLING -, (2025), s.116100-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apm.2025.116100
Sources of funding:
  • Free publication
Verified by:
Gdańsk University of Technology

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