A Simple Finite Volume Solver for Matlab

版本 2.1.1.0 (1008.2 KB) 作者: Ehsan
A simple yet general purpose FVM solver for transient convection diffusion PDE
5.0
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12.2K 次下载
更新时间 2023/7/4
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FVTool: Finite volume toolbox for Matlab

View A Simple Finite Volume Solver for Matlab on File Exchange

Tiny Documents 📘.

FVTool in:

Python: PyFVTool
Julia: JFVM.jl

FVTool

This is a finite volume (toy) toolbox for chemical/petroleum engineers. Right now, it can solve a transient convection-diffusion equation with variable velocity field/diffusion coefficients. The discretization schemes include:

  • central difference diffusion term
  • central difference convection term
  • upwind convection term
  • TVD convection term with various flux limiters
  • transient term
  • Dirichlet, Neumann, Robin, and periodic boundary conditions

diffusion pde

Which equation do you solve?

You can solve the following PDE (or a subset of it):
advection diffusion

with the following boundary conditions:
boundary condition

Believe it or not, the above equations describe the majority of the transport phenomena in chemical and petroleum engineering and similar fields.

How to start

Download the package, start matlab, and run FVToolStartUp

Inspiration

I started writing this tool after playing with FiPy, an amazing python-based finite volume solver. This matlab solver is not a clone, and indeed very limited compared to FiPy. I wrote it to have a very handy tool for testing new ideas (new mathematical models) by solving them in 1D uniform Cartesian grids. Then I extended the code to

  • 1D axisymmetric (radial)
  • 2D radial (r, theta)
  • 2D Cartesian
  • 3D Cartesian
  • 2D axisymmetric (cylindrical, r, z)
  • 3D cylindrical (r, theta, z)

I have overloaded some of the matlab operators to simplify the switch from 1D codes to 2D and 3D.

A simple example

You can solve a diffusion equation, i.e., $ \nabla. (-D \nabla \phi) = 0 $ by running the following code in Matlab:

clc
L = 50;  % domain length
Nx = 20; % number of cells
m = createMesh1D(Nx, L);
BC = createBC(m); % all Neumann boundary condition structure
BC.left.a(:) = 0; BC.left.b(:)=1; BC.left.c(:)=1; % Dirichlet for the left boundary
BC.right.a(:) = 0; BC.right.b(:)=1; BC.right.c(:)=0; % right boundary
D_val = 1; % value of the diffusion coefficient
D = createCellVariable(m, D_val); % assign the diffusion coefficient to the cells
D_face = harmonicMean(D); % calculate harmonic average of the diffusion coef on the cell faces
Mdiff = diffusionTerm(D_face); % matrix of coefficients for the diffusion term
[Mbc, RHSbc] = boundaryCondition(BC); % matrix of coefficients and RHS vector for the BC
M = Mdiff + Mbc; % matrix of coefficients for the PDE
c = solvePDE(m,M, RHSbc); % send M and RHS to the solver
visualizeCells(c); % visualize the results

change the third line to m = createMesh2D(Nx,Nx, L,L); or m = createMesh3D(Nx,Nx,Nx, L,L,L); and see the outcome for yourself.
diff 3D

Examples

There are a few simple examples in the Tutorial folder. You can also find a few more advanced examples (water injection into a heterogeneous oil field, two nonlinear PDEs, coupled fully implicit solution) in the Advanced folder.

Documents

Find some preliminary documents here.

But Matlab is not a free software?

You can use the code in octave. The new (object oriented) version of the code works in Octave 4.0 (with the new classdef function).
I've re-written the code in Julia. It works fine, but the visualization on Windows OS has still some issues.

Questions and bug reports

You can ask your questions by creating a new issue here, or by writing a comment in my blog. You can also ask your question in the Matlab file exchange page of this code. I truly appreciate your feedback and/or contribution.

How to cite:

If you have used the package in your work and you find it usefull, please cite it as:

@misc{ali_akbar_eftekhari_2015_32745,
  author       = {Ali Akbar Eftekhari and Kai Schüller and Ferran Brosa Planella and Martinus Werts and Behzad Hosseinzadeh},
  title        = {FVTool: a finite volume toolbox for Matlab},
  month        = oct,
  year         = 2015,
  doi          = {10.5281/zenodo.32745},
  url          = {https://doi.org/10.5281/zenodo.32745}
}

I will also appreciate it if you write me a couple of lines about how you have used it in your research. It encourages me to maintain the code.

引用格式

Eftekhari, A.A. et al. (2015). FVTool: a finite volume toolbox for Matlab. Zenodo. http://doi.org/10.5281/zenodo.32745

MATLAB 版本兼容性
创建方式 R2014a
兼容任何版本
平台兼容性
Windows macOS Linux
致谢

参考作品: IAPWS_IF97

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Boundary

Calculus

Classes/@BoundaryCondition

Classes/@CellVariable

Classes/@CellVector

Classes/@FaceVariable

Classes/@MeshStructure

Discretization

Examples/Advanced

Examples/External/Diffusion1DSpherical_Analytic-vs-FVTool-vs-Fipy

Examples/External/InjectionHClCoreFloodProblem

Examples/External/PhaseChangeEnthalpyMethod

Examples/External/PhaseChangeEnthalpyMethod/Functions

Examples/External/SteadyLidDrivenCavityProblem

Examples/External/SteadyLidDrivenCavityProblem/Functions

Examples/External/SteadyLidDrivenCavityProblem/Testcases

Examples/Tutorial

FieldGeology

MeshGeneration

PhysicalProperties

Physics

Solvers

Tests

Utilities

Visualization

Examples/Validation

无法下载基于 GitHub 默认分支的版本

版本 已发布 发行说明
2.1.1.0

Switched to github repository readme
2.1.0.0

Citation information and some clean up
2.0.0.0

showdemo function is not available. I will update it later.
1.4.0.0

added support for 2D radial (r, theta) and 3D cylindrical (r, thetta, z)
1.3.0.0

updated descriptions
1.2.0.0

update my weblog address
1.1.0.0

add youtube channel link to descriptions
1.0.0.0

要查看或报告此来自 GitHub 的附加功能中的问题，请访问其 GitHub 仓库。
要查看或报告此来自 GitHub 的附加功能中的问题，请访问其 GitHub 仓库。