Abstract
In this paper, a multi-domain method, based on the dual interpolation boundary face method with Hermite-type moving-least-squares approximation (DiBFM-HMLS) and the matrix condensation technique, is firstly proposed for the 3D potential problems. This method is superior in the discontinuous field simulation (such as the corner problem) and can implement accurate interpolation in geometric structures with thin walls. Matrix condensation and reassembly reduce the overall system of linear algebraic equations to the interfacial ones with sparsity. This blocked-sparse-dominated multi-domain DiBFM-HMLS takes fewer CPU operations than its single-domain counterparts. Additionally, the interfacial conditions are not in the node-to-node format anymore, and instead, a node-to-element projective scheme built on the dual interpolation element of DiBFM-HMLS is presented for free mesh division in the interfaces (such as in self-adaption problems). Several numerical experiments from different aspects illustrate the feasibility and reliability of our multi-domain algorithms.
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This work was supported by National Natural Science Foundation of China under grant numbers 11772125 and 11972010.
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Chai, P., Zhang, J., Xiao, R. et al. A multi-domain BEM based on the dual interpolation boundary face method for 3D potential problems. Acta Mech 234, 451–469 (2023). https://doi.org/10.1007/s00707-022-03414-0
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DOI: https://doi.org/10.1007/s00707-022-03414-0