Abstract
The three-dimensional numerical manifold method (3D-NMM), which is based on the derivation of Galerkin’s variation, is a powerful calculation tool that uses two cover systems. The 3D-NMM can be used to handle continue-discontinue problems and extend to THM coupling. In this study, we extended the 3D-NMM to simulate both steady-state and transient heat conduction problems. The modelling was carried out using the raster methods (RSM). For the system equation, a variational method was employed to drive the discrete equations, and the crucial boundary conditions were solved using the penalty method. To solve the boundary integral problem, the face integral of scalar fields and two-dimensional simplex integration were used to accurately describe the integral on polygonal boundaries. Several numerical examples were used to verify the results of 3D steady-state and transient heat-conduction problems. The numerical results indicated that the 3D-NMM is effective for handling 3D both steady-state and transient heat conduction problems with high solution accuracy.
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This work was supported by the National Natural Science Foundation of China (Grant Nos. 42277165, 41920104007 and 41731284), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (Grant No. CUGCJ1821 and CUGDCJJ202234), and the National Overseas Study Fund (Grant No. 202106410040).
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Tong, D., Yi, X., Tan, F. et al. Three-dimensional numerical manifold method for heat conduction problems with a simplex integral on the boundary. Sci. China Technol. Sci. 67, 1007–1022 (2024). https://doi.org/10.1007/s11431-022-2321-9
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DOI: https://doi.org/10.1007/s11431-022-2321-9