نتایج جستجو برای: Cell-centered finite volume method
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یک برنامه کامپیوتری جهت حل معادلات جریان غیرلزج در نازل های برون از مرکز سه بعدی و همچنین نازل های هم مرکز سه بعدی تهیه شده است . در حل معادلات از روش حجم کنترل (cell-centered fintie volume)، مبتنی بر حل تقریبی مسئله ریمان roe استفاده شده است . برای نشان دادن دقت و قابلیت این برنامه، نتایج حاصل دشه از نازل های هم مرکز دایروی با جواب مسئله یک بعدی مورد مقایسه قرار گرفته و سپس نتایج جریان دایمی و...
In our talk, we propose an adaptive mesh-refining strategy for the cell-centered FVM based on some a posteriori error control for the quantity ‖∇T (u − Iuh)‖L2 . Here, uh ∈ P (T ) denotes the FVM approximation of u and I is a certain interpolation operator. As model example serves the Laplace equation with mixed boundary conditions, where our contributions extend a result of [NIC05]. Moreover, ...
in this paper, a viscous flow simulation is presented using the lattice boltzmann equation (lbe). a finite volume approach is adapted to discretize the lbe on a cell-centered, arbitrary shaped, rectangular tessellation. the formulation includes upwind scheme and high order descretization schemes for the flux term and collision operator respectively. a consistent open and solid boundary treatmen...
Cell-centered finite volume methods are prevailing in numerical simulation of flow in porous media. However, due to the lack of cell-centered finite volume methods for mechanics, coupled flow and deformation is usually treated either by coupled finite-volume-finite element discretizations, or within a finite element setting. The former approach is unfavorable as it introduces two separate grid ...
In this paper, the cell-centered finite volume method (CC-FVM) has been presented to simulate the axisymmetric radial flow toward a pumping well. The model is applied to the unstructured triangular grids which allows to simulate inhomogeneous and complex-shaped domains. Due to the non-orthogonality of the irregular grids, the multipoint flux approximation (MPFA) methods are used to discretize t...
A posteriori error analysis of a cell-centered finite volume method for semilinear elliptic problems
In this paper, we conduct an a posteriori analysis for the error in a quantity of interest computed from a cell-centered finite volume scheme. The a posteriori error analysis is based on variational analysis, residual error and the adjoint problem. To carry out the analysis, we use an equivalence between the cell-centered finite volume scheme and a mixed finite element method with special choic...
دراین پروژه ابتدا مروری بر ساختار محفظه ها کرده و بعد از آن به بررسی کاتد مجازی که اساس ساختار لامپهای توان بالا می باشد می پردازیم .سپس روش تقسیم بندی ذرات در سلولها (particle in cell) که جهت شبیه سازی این گونه محفظه ها بکار برده می شود ، مورد بررسی قرار می گیرد . در فصل بعد آلگوریتم و معادلات موجوددر این شبیه سازی همراه با مروری بر روش تفاضلی محدود (finite difference method) ارائه می ...
We show convergence of a cell-centered finite volume discretization for linear elasticity. The discretization, termed the MPSA method, was recently proposed in the context of geological applications, where cell-centered variables are often preferred. Our analysis utilizes a hybrid variational formulation, which has previously been used to analyze finite volume discretizations for the scalar dif...
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