Results 231 to 240 of about 1,278 (268)
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Heterogeneous discontinuity factor treatment in Variational Nodal Method
Annals of Nuclear Energy, 2019Abstract To handle the control rod cusping effect in Pressurized Water Reactor (PWR) core calculation, the heterogeneous Variational Nodal Method (VNM) employed by the fuel management calculation code system NECP-Bamboo has been enhanced to treat heterogeneous discontinuity factor (DF) appearing on nodal interface.
Yunzhao Li, Hongchun Wu
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Adaptive expansion order for diffusion Variational Nodal Method
Annals of Nuclear Energy, 2018Abstract The Variational Nodal Method (VNM) has been employed as the diffusion module in our PWR core analysis code Bamboo-Core within our PWR fuel management code system NECP-Bamboo. It expands the nodal volumetric flux and surface partial currents into the sums of orthogonal basis functions without using the transverse integration technique.
Hongchun Wu, Yunzhao Li
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Generalized Partitioned Matrix Acceleration for Variational Nodal Diffusion Method
Nuclear Science and Engineering, 2019The Generalized Partitioned Matrix (GPM) acceleration method for the Variational Nodal Method (VNM) with diffusion approximation is presented.
Yunzhao Li, Tengfei Zhang, E E Lewis
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Annals of Nuclear Energy, 2019
Abstract As a continued research for our previous work, a hybrid method to accelerating pin-by-pin calculations based on the heterogeneous variational nodal method (VNM) is presented. Previously the coarse node acceleration method (CNA) was proposed for inner iterations. In this paper, the formulation of the generalized partitioned matrix method (GPM)
Tengfei Zhang, Jinbiao Xiong
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Abstract As a continued research for our previous work, a hybrid method to accelerating pin-by-pin calculations based on the heterogeneous variational nodal method (VNM) is presented. Previously the coarse node acceleration method (CNA) was proposed for inner iterations. In this paper, the formulation of the generalized partitioned matrix method (GPM)
Tengfei Zhang, Jinbiao Xiong
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A discrete-ordinates variational nodal method for heterogeneous neutron Boltzmann transport problems
Computers and Mathematics With ApplicationszbMATH Open Web Interface contents unavailable due to conflicting licenses.
Qizheng Sun +2 more
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Partitioned-Matrix acceleration to the Fission-Source iteration of the Variational Nodal Method
Progress in Nuclear Energy, 2015Abstract The Variational Nodal Method (VNM) expands the nodal volumetric flux and surface partial current into the sums of orthogonal basis functions without using the transverse integration technique. The exclusion of the transverse integration provides a number of advantages for employing the VNM in Pressurized Water Reactor (PWR) core simulation ...
Yunzhao Li
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Annals of Nuclear Energy, 2021
Abstract With the development of nuclear technology, new concepts of reactor core have been continuously proposed, and new types of geometric assembly and reactor core configuration would be adopted to achieve better characteristics. Traditional nodal method based on rectangle or hexagonal nodal is no longer applicable for complex geometry modeling ...
Kun Zhuang, Sipeng Wang
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Abstract With the development of nuclear technology, new concepts of reactor core have been continuously proposed, and new types of geometric assembly and reactor core configuration would be adopted to achieve better characteristics. Traditional nodal method based on rectangle or hexagonal nodal is no longer applicable for complex geometry modeling ...
Kun Zhuang, Sipeng Wang
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A conservative nodal variational multiscale method for Lagrangian shock hydrodynamics
Computer Methods in Applied Mechanics and Engineering, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Guglielmo Scovazzi, E Love, W J Rider
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Annals of Nuclear Energy, 2019
Abstract This paper presents recent progress of the development and implementation of the integral transport variational nodal method (VNM) to the neutronics modelling of hexagonal geometry nuclear reactors. In this study, the three-dimensional multi-group neutron transport equation is solved with the variational nodal method utilizing an integral ...
Tengfei Zhang +2 more
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Abstract This paper presents recent progress of the development and implementation of the integral transport variational nodal method (VNM) to the neutronics modelling of hexagonal geometry nuclear reactors. In this study, the three-dimensional multi-group neutron transport equation is solved with the variational nodal method utilizing an integral ...
Tengfei Zhang +2 more
exaly +2 more sources
Acceleration of 3D pin-by-pin calculations based on the heterogeneous variational nodal method
Annals of Nuclear Energy, 2018Abstract The pin-by-pin method with homogenization performed at the pin cell level is of considerable interest in thermal reactor physics calculations. However, significant computational costs are required in pin-by-pin calculations due to the fine spatial meshes.
Tengfei Zhang +2 more
exaly +2 more sources