scholarly journals Failure of Anisotropic Unstructured Mesh Adaption Based on Multidimensional Residual Minimization

2003 ◽  
Author(s):  
William Wood ◽  
William Kleb
Keyword(s):  
Unstructured Mesh ◽  
Mesh Adaption ◽  
Residual Minimization

Anisotropic unstructured mesh adaption for flow simulations

1997 ◽  
Vol 25 (4) ◽  
pp. 475-491 ◽  
Author(s):  
M. J. Castro-Díaz ◽  
F. Hecht ◽  
B. Mohammadi ◽  
O. Pironneau
Keyword(s):  
Unstructured Mesh ◽  
Flow Simulations ◽  
Mesh Adaption

VVER-1000 fuel assembly model in CAD-based unstructured mesh for MCNP6

Kerntechnik ◽  
2019 ◽  
Vol 84 (4) ◽  
pp. 262-266
Author(s):  
M. Lovecký ◽  
J. Závorka ◽  
J. Vimpel
Keyword(s):  
Fuel Assembly ◽  
Unstructured Mesh ◽  
Assembly Model

Big Ten MCNP6 Unstructured Mesh Benchmark

2019 ◽  
Author(s):  
Joshua Bradly Spencer ◽  
Jennifer Louise Alwin
Keyword(s):  
Unstructured Mesh ◽  
Big Ten

scholarly journals Performance of Adaptive Unstructured Mesh Modelling in Idealized Advection Cases over Steep Terrains

Atmosphere ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 444 ◽  
Author(s):  
Jinxi Li ◽  
Jie Zheng ◽  
Jiang Zhu ◽  
Fangxin Fang ◽  
Christopher. Pain ◽  
...  
Keyword(s):  
Unstructured Mesh ◽  
Computational Cost ◽  
Adaptive Mesh ◽  
Galerkin Finite Element Method ◽  
Adaptive Meshes ◽  
Galerkin Finite Element ◽  
Computational Costs ◽  
Cut Cell ◽  
Discontinuous Galerkin Finite Element ◽  
Terrain Following

Advection errors are common in basic terrain-following (TF) coordinates. Numerous methods, including the hybrid TF coordinate and smoothing vertical layers, have been proposed to reduce the advection errors. Advection errors are affected by the directions of velocity fields and the complexity of the terrain. In this study, an unstructured adaptive mesh together with the discontinuous Galerkin finite element method is employed to reduce advection errors over steep terrains. To test the capability of adaptive meshes, five two-dimensional (2D) idealized tests are conducted. Then, the results of adaptive meshes are compared with those of cut-cell and TF meshes. The results show that using adaptive meshes reduces the advection errors by one to two orders of magnitude compared to the cut-cell and TF meshes regardless of variations in velocity directions or terrain complexity. Furthermore, adaptive meshes can reduce the advection errors when the tracer moves tangentially along the terrain surface and allows the terrain to be represented without incurring in severe dispersion. Finally, the computational cost is analyzed. To achieve a given tagging criterion level, the adaptive mesh requires fewer nodes, smaller minimum mesh sizes, less runtime and lower proportion between the node numbers used for resolving the tracer and each wavelength than cut-cell and TF meshes, thus reducing the computational costs.

A Mathematic Model Based on Unstructured Mesh for Simulating Ice Accretion on Aircraft

2019 ◽  
Author(s):  
Ningli Chen ◽  
Yaping Hu ◽  
Honghu Ji ◽  
Yongqing Yuan ◽  
Guangzhou Cao
Keyword(s):  
Unstructured Mesh ◽  
Mathematic Model ◽  
Ice Accretion ◽  
Model Based
Sign in / Sign up

Export Citation Format

Share Document