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arXiv · 1702.02474

A simple field function for solving complex and dynamic fluid-solid system on Cartesian grid

Huangrui Mo·Fue-Sang Lien·Fan Zhang·Duane S. Cronin
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Abstract

In this paper, a simple field function is presented for facilitating the solution of complex and dynamic fluid-solid systems on Cartesian grids with interface-resolved fluid-fluid, fluid-solid, and solid-solid interactions. For a Cartesian-grid-discretized computational domain segmented by a set of solid bodies, this field function explicitly tracks each subdomain with multiple resolved interfacial node layers. As a result, the presented field function enables low-memory-cost multidomain node mapping, efficient node remapping, fast collision detection, and expedient surface force integration. Implementation algorithms for the field function and its described functionalities are also presented. Equipped with a deterministic multibody collision model, numerical experiments involving fluid-solid systems with flow conditions ranging from subsonic to supersonic states are conducted to validate and illustrate the applicability of the proposed field function.

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Huangrui Mo, Fue-Sang Lien, Fan Zhang, Duane S. Cronin. 2017-02-08. A simple field function for solving complex and dynamic fluid-solid system on Cartesian grid. https://arxiv.org/abs/1702.02474

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