Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 홍서기 | - |
dc.date.accessioned | 2021-09-27T07:47:52Z | - |
dc.date.available | 2021-09-27T07:47:52Z | - |
dc.date.issued | 2020-03 | - |
dc.identifier.citation | NUCLEAR ENGINEERING AND TECHNOLOGY, v. 52, no. 3, page. 485-498 | en_US |
dc.identifier.issn | 1738-5733 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S1738573319305881?via%3Dihub | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/165165 | - |
dc.description.abstract | A diffusion synthetic acceleration (DSA) technique for the S-N transport equation discretized with the linear discontinuous expansion method with subcell balance (LDEM-SCB) on unstructured tetrahedral meshes is presented. The LDEM-SCB scheme solves the transport equation with the discrete ordinates method by using the subcell balances and linear discontinuous expansion of the flux. Discretized DSA equations are derived by consistently discretizing the continuous diffusion equation with the LDEM-SCB method, however, the discretized diffusion equations are not fully consistent with the discretized transport equations. In addition, a fine mesh rebalance (FMR) method is devised to accelerate the discretized diffusion equation coupled with the preconditioned conjugate gradient (CG) method. The DSA method is applied to various test problems to show its effectiveness in speeding up the iterative convergence of the transport equation. The results show that the DSA method gives small spectral radii for the tetrahedral meshes having various minimum aspect ratios even in highly scattering dominant mediums for the homogeneous test problems. The numerical tests for the homogeneous and heterogeneous problems show that DSA with FMR (with preconditioned CG) gives significantly higher speedups and robustness than the one with the Gauss-Seidel-like iteration. | en_US |
dc.description.sponsorship | This work was supported by the NRF (National Research Foundation of Korea) through Project No. 2019M2D2A1A02057890. | en_US |
dc.language.iso | en | en_US |
dc.publisher | KOREAN NUCLEAR SOC | en_US |
dc.subject | Neutron transport equation | en_US |
dc.subject | Diffusion equation | en_US |
dc.subject | DFEM | en_US |
dc.subject | LDEM-SCB | en_US |
dc.subject | Tetrahedral mesh | en_US |
dc.title | Diffusion synthetic acceleration with the fine mesh rebalance of the subcell balance method with tetrahedral meshes for SN transport calculations | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.net.2019.08.021 | - |
dc.relation.page | 485-498 | - |
dc.relation.journal | NUCLEAR ENGINEERING AND TECHNOLOGY | - |
dc.contributor.googleauthor | Muhammad, Habib | - |
dc.contributor.googleauthor | Hong, Ser Gi | - |
dc.relation.code | 2020052249 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF NUCLEAR ENGINEERING | - |
dc.identifier.pid | hongsergi | - |
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