An unstructured solver for simulations of deformable particles in flows at arbitrary Reynolds numbers

作者：Mendez S^*; Gibaud E; Nicoud F

来源：Journal of Computational Physics, 2014, 256: 465-483.

DOI：10.1016/j.jcp.2013.08.061

• Capsule/cell dynamics
• Unstructured solver
• Immersed boundary method
• Validation

As a step in the development of a numerical procedure able to perform parallel computations of the dynamics of capsules/cells in non-physiological configurations, a numerical method is developed and its validation is described. The fluid-structure interaction problem is solved using an immersed boundary method, adapted to an unstructured finite-volume flow solver thanks to the reproducing kernel particle method. A specific treatment to ensure volume conservation of the fluid enclosed in the immersed structure is also detailed. The present paper focuses on quantitative validation of the method in 2-D, against existing reference 2-D results. Excellent agreement is obtained for configurations of capsules and vesicles evolving with or without mean flow. Applications of the method to non-zero-Reynolds-number cases, including non-trivial geometry, is shown. This unstructured immersed boundary method proves robust to tackle the dynamics of deformable particles in complex flows.

• 出版日期2014-1-1