Results 1 to 10 of about 2,181 (119)
Nodal SN-method for HEX-Z geometry [PDF]
Nuclear Energy and Technology, 2016 The problem of spatial approximation becomes very important in the solution of neutronics problems with coarse spatial grids, in particular, in the calculations of fuel assemblies of fast reactors (for instance, BN-800 and BN-1200 reactors) with ...
V.P. Bereznev
doaj +2 more sources
IMPLEMENTATION AND COMPARISON OF LATTICE MODULE AND DISCONTINUITY FACTORS MODULE IN PROTEUS TOOLSETS [PDF]
EPJ Web of Conferences, 2021 State-of-the-art core nodal diffusion calculation involves the use of assembly discontinuity factor (ADF) to improve computational accuracy by introducing degree of freedom describing the relationship between interfacial discontinuities in nodal ...
Ni Kan, Hou Jason, Avramova Maria
doaj +1 more source
COMPARISONS AMONG THREE COUPLING FORMS OF CYLINDRICAL NODAL EXPANSION METHODS [PDF]
EPJ Web of Conferences, 2021 Nodal expansion method (NEM) is a typical nodal method in solving neutron diffusion equation in coarse mesh spatial discretization. NEM has been extended to cylindrical geometry in previous studies.
Wen Yutong, She Ding, Shi Lei, Zhao Jing
doaj +1 more source
Stable Filtering Procedures for Nodal Discontinuous Galerkin Methods [PDF]
Journal of Scientific Computing, 2021 AbstractWe prove that the most common filtering procedure for nodal discontinuous Galerkin (DG) methods is stable. The proof exploits that the DG approximation is constructed from polynomial basis functions and that integrals are approximated with high-order accurate Legendre–Gauss–Lobatto quadrature. The theoretical discussion re-contextualizes stable
Jan Nordström, Andrew R. Winters
openaire +3 more sources
Stable Nodal Projection Method on Octree Grids
Journal of Computational Physics, 2023 We propose a novel collocated projection method for solving the incompressible Navier-Stokes equations with arbitrary boundaries. Our approach employs non-graded octree grids, where all variables are stored at the nodes. To discretize the viscosity and projection steps, we utilize supra-convergent finite difference approximations with sharp boundary ...
Matthew Blomquist +3 more
openaire +3 more sources
A nodally bound-preserving finite element method
IMA Journal of Numerical Analysis, 2023 Abstract This work proposes a nonlinear finite element method whose nodal values preserve bounds known for the exact solution. The discrete problem involves a nonlinear projection operator mapping arbitrary nodal values into bound-preserving ones and seeks the numerical solution in the range of this projection.
Barrenechea, Gabriel R +3 more
openaire +4 more sources
Nodal diameter vibration identification of coated blisk under traveling wave excitation
Journal of Low Frequency Noise, Vibration and Active Control, 2021 It is seen that blisk will be in a nodal diameter vibration state under the engine order excitation, which can be simulated by traveling wave excitation.
Jin Wang, Wei Sun, Kunpeng Xu
doaj +1 more source
Numerical Solutions of Inverse Nodal Problems for a Boundary Value Problem
Mathematics, 2022 In this paper, we study inverse nodal problems for a boundary value problem. A uniqueness result for the potential function and a reconstruction method are obtained.
Yong Tang +3 more
doaj +1 more source
Comparison of methods for modelling geomagnetically induced currents [PDF]
Annales Geophysicae, 2014 Assessing the geomagnetic hazard to power systems requires reliable modelling of the geomagnetically induced currents (GIC) produced in the power network.
D. H. Boteler +2 more
doaj +1 more source
地震科学进展, 2021 On June 9，2020，an earthquake measuring ML3.4 occurred in Shapotou District，Zhongwei City，Ningxia. The earthquake occurred in the meizoseismal area of the 1709 M7½ earthquake of South Zhongwei，and its epicenter is located in an area where there were ...
Yingcai Xu +3 more
doaj +1 more source