Results 31 to 40 of about 11,516 (229)
Unigrid for multigrid simulation [PDF]
Mathematics of Computation, 1983 This paper develops unigrid which is an algorithm that results from interpreting multigrid as it directly affects the fine grid approximation. Unigrid is theoretically equivalent to multigrid under certain assumptions, yet has different computational characteristics.
McCormick, S. F., Ruge, J. W.
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Enhanced Microplastic Flotation: Unraveling the Role of Bubble-Chain Hydrodynamics via PIV Analysis. [PDF]
Water Environ ResA rising bubble‐chain generates overlapping vortex structures that enhance the upward transport and flotation of microplastic particles. This study identifies bubble‐chain hydrodynamics as a key mechanism for improving microplastic removal efficiency in dissolved air flotation processes.
Nam HJ, Han SJ, Kim JJ.
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Robust Multigrid Technique [PDF]
Mathematical Models and Computer Simulations, 2003 A new robust multigrid technique for solving a large class of boundary value problems on structured grids is proposed. The technique is based on incorporation of adaption of equations to the technique, the control volume discretization and original multigrid solver into general algorithm.
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Advances in Difference Equations, 2018 In this paper, we propose an extrapolation full multigrid (EXFMG) algorithm to solve the large linear system arising from a fourth-order compact difference discretization of two-dimensional (2D) convection diffusion equations.
Ming Li, Zhoushun Zheng, Kejia Pan
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SN Applied Sciences, 2022 Article Highlights The use of a p-multigrid method significantly reduces the CPU timings for higher values of the spline degree. The Multigrid Reduction in Time method shows both strong and weak scalability up to 2048 cores.
Roel Tielen +2 more
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A note on multigrid preconditioning for fractional PDE-constrained optimization problems
Results in Applied Mathematics, 2021 In this note we present a multigrid preconditioning method for solving quadratic optimization problems constrained by a fractional diffusion equation.
Harbir Antil +2 more
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Mathematical Modelling and Analysis, 2014 This paper presents a full multigrid (FMG) technique, which combines a multigrid method, an active set algorithm and a nested iteration technique, to solve a linear complementarity problem (LCP) modeling elastic normal contact problems.
Jing Zhao +2 more
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Convergence Analysis of Multigrid Solver for Cahn-Hilliard Equation [PDF]
Jisuanji kexue, 2023 The Cahn-Hilliard(CH) equation is a fundamental nonlinear equation in the phase field model and is usually analyzed using numerical methods.Following a numerical discretization,we get a nonlinear equations system.The full approximation scheme(FAS) is an ...
GUO Jing, QI Deyu
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Overlapping Domain Decomposition Method with Cascadic Multigrid for Image Restoration
Mathematics, 2023 In the process of image restoration, it is usually necessary to solve large-scale inverse problems, where the computational cost is very high for large or high-resolution images.
Zhaoteng Chu, Chenliang Li
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On Multigrid for Overlapping Grids [PDF]
SIAM Journal on Scientific Computing, 2005 Summary: The solution of elliptic partial differential equations on composite overlapping grids using multigrid is discussed. An approach is described that provides a fast and memory efficient scheme for the solution of boundary value problems in complex geometries. The key aspects of the new scheme are an automatic coarse grid generation algorithm, an
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