Boundary Conditions
The main file interpMatrix.m in this package creates a sparse Toeplitz-like matrix representing a regularly-spaced interpolation operation between a set of control points. The user can specify the interpolation kernel, the number of control points, the spacing between the control points, and...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (41): Regular Control Point Interpolation Matrix with Boundary Conditions Download |
A Lambert-orbital boundary value problem can be stated as"Find the orbit/trajectory of a spacecraft that flies from position [r1] to [r2], taking a time [tf] and making [m] complete orbits before arriving at [r2]. "The solution to each Lambert-problem is NOT unique; one can travel to [r2] via the...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (46): Robust solver for Lambert's orbital-boundary value problem Download |
This script simulates the time evolution of a quantum mechanical wavepacket on the unit square with Dirichlet boundary conditions. Spatial discretization is with a Chebyshev-tau spectral method and time discretization is with a second order Crank-Nicholson method.
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (43): 2D Wavepacket Time Evolution Download |
Input data is the Microsoft ExceldlT« file, where the table of nodes, table of elements, nodal external loads vector and boundary conditions are stored.After running the mabs3d.m file on the Command Window, the program calculates the stiffness matrix in local coordinates kiL (element i). Once...
Platforms: Matlab
License: Freeware | Size: 20.48 KB | Download (47): Matrix Analysis of Three Dimensional Bar Structures MABS3D Download |
Input data is the MS Excel file, where the table of nodes, table of elements, nodal external loads vector and boundary conditions are stored.After running the mabs2d.m file on the Command Window, the program calculates the stiffness matrix in local coordinates kiL (element i). Once the...
Platforms: Matlab
License: Freeware | Size: 30.72 KB | Download (50): Matrix Analysis of Two Dimensional Bar Structures MABS2D Download |
An intuitive tool for visualising the behavior of structures subjected to loading and boundary conditions. The design of the user interface aims to be as intuitive as a standard image processing software. Users should be able to design structures, apply loads and define boundary conditions...
Platforms: Mac
License: Freeware | Size: 2.7 MB | Download (47): ForcePAD for Mac OS Download |
The samples of code included numerically solve the diffusion equation as it arises in medical imaging. This process is done with multiple solution methods, various boundary conditions, and in multiple dimensions.
Platforms: Matlab
License: Freeware | Size: 112.64 KB | Download (56): Matlab code for my Graduate Thesis Download |
A thin plate under uniform transverse pressure is considered with simply supported and clamped boundary conditions. Using Finite Element Method plate equations are solved. Pre-processing is done using a standard FEM software. Plate is dicretized Isoparametric four noded Q4 elements. The values...
Platforms: Matlab
License: Freeware | Size: 808.96 KB | Download (47): Plate Bending Download |
The method uses finite differences to solve Laplace equation and matrix inversion to solve the resulting system of linear algebraic equations. The rectangular plate has both dimensions set equal to unity. Each dimension is discretized and the total number of nodal points is equal to 29*29. To...
Platforms: Matlab
License: Freeware | Size: 30.72 KB | Download (45): Temperature Profile in a Rectangular Plate Download |
PDL::Image2D is a Perl module that contains miscellaneous 2D image processing functions. For large kernels, using a FFT routine, such as fftconvolve() in PDL::FFT, will be quicker. $new = conv2d $old, $kernel, {OPTIONS} $smoothed = conv2d $image, ones(3,3), {Boundary => Reflect} Boundary -...
Platforms: *nix
License: Freeware | Size: 2.1 MB | Download (100): PDL::Image2D Download |
This toolbox implements the methods of [1] and [2] to design H-infinity controllers for linear spatio-temporally invariant, or multidimensional (MD), systems. Utilities are also provided for the following types of operations on MD systems:1. System description (MD systems are specified via a...
Platforms: Matlab
License: Freeware | Size: 5.36 MB | Download (43): Multidimensional Systems Toolbox Download |
The Getfem++ project focuses on the development of a generic and efficient C++ library for finite element methods elementary computations. The goal is to provide a library allowing the computation of any elementary matrix (even for mixed finite element methods) on the largest class of methods and...
Platforms: *nix
License: Freeware | Size: 4.3 MB | Download (107): Getfem Download |
Free Finite Element Package is a modular collection of C libraries which contain numerical methods required when working with linear and quadratic finite elements in two dimensions. FFEP works on GNU/Linux and is portable to every system where MEML (i.e. LAPACK and BLAS) are available. The goal...
Platforms: *nix
License: Freeware | Size: 337.92 KB | Download (125): Free Finite Element Package Download |
Channelflow is a direct numerical simulator for incompressible Navier-Stokes channel flow, written in C++. Channelflow application simulates fluid flow in a rectangular box, with no-slip boundary conditions on the upper and lower surfaces of the box, and periodic boundary conditions in the...
Platforms: *nix
License: Freeware | Size: 440.32 KB | Download (98): Channelflow Download |
TestGen4J automatically generates JUnit test cases from your own Java class files or source files. Its primary focus is to exercise boundary value testing of the arguments passed to the method. It uses rules, written in a user-configurable XML file, that define boundary conditions for the data...
Platforms: *nix
License: Freeware | Size: 849.92 KB | Download (144): TestGen4J Download |
AutoFEM Analysis Lite is a free system of finite-element analysis. The main feature of the system is its deep integration with AutoCAD.
Using AutoFEM Analysis Lite each user of AutoCAD gets possibility to solve the problems of finite-element modeling of various physical phenomena:
- static...
Platforms: Windows
License: Freeware | Size: 163.67 MB | Download (243): AutoFEM Analysis Lite Download |
PMViewer is a Visualization tool for Astrophysical N-Body and Hydro Simulations. GADGET-2 data support.With/Without periodical boundary conditions.Snapshot of scene in PPM and GIF formats.Flying in 3D space. Active/Passive Stereo 3D support.
Platforms: Windows, Mac, BSD, Linux
License: Freeware | Size: 571.69 KB | Download (43): Particle in Mesh Viewer Download |
C-Library & Matlab Toolbox implement a numerical solution of Poisson equationdiv(e*grad(u))=ffor Cartesian 1D, Cartesian 2D and axis-symmetrical cylindrical coordinates with respect to steeply varying dielectrical permittivity e.Library uses regular rectangular grid with mixed boundary...
Platforms: Matlab
License: Freeware | Size: 30.72 KB | Download (50): Finite Volume Poisson Solver Download |
This solver computes the internal loads on each member of two dimensional isostatic truss structures by using the method of joints.Since the Theory of Deformations is not considered in this program, displacements of the structures are not computed. All assumptions of Rational Mechanics are made...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (47): Two Dimensional Isostatic Truss Structures Solver ITSS2D Download |
Matlab implementation of a monodomain reaction-diffusion model in 2-D. The model equations are a variant of the Fitzhugh-Nagumo equations modified to simulate the cardiac action potential. The progression of the two normalized state variables, membrane voltage (v) and recovery (r), is computed...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (46): Spiral waves in monodomain reaction-diffusion model Download |