Open source finite element software for multiphysical problems
Elmer is a finite element software for numerical solution of partial differential equations and multiphysical problems. It includes models of structural mechanics, fluid dynamics, heat transfer, electromagnetics etc. Elmer home is www.csc.fi/elmer
Software for electromagnetic simulation
MaxFem is an open software package for electromagnetic simulation by using finite element methods. The package can solve problems in electrostatics, direct current, magnetostatics and eddy-currents. We have moved the installers to the MaxFEM website (see below). In order to improve MaxFEM, we will require you to fill out a simple form before downloading them.
console to calculate airflow around an airfoil based on RANS approach
RANSFOIL is a console program to calculate airflow field around an isolated airfoil in low-speed, subsonic, transonic or supersonic regime by numerically solving the Reynolds averaged Navier-Stokes (RANS) equations using mature computational fluid dynamics (CFD) method. As postprocess results, the aerodynamic parameters of the airfoil, e.g., lift coefficient and drag coefficient, can be integrated from the airflow distribution near wall boundary. In addition, the coupling between airflow and heat transfer and the effect of surface roughness on near wall flow are considered by this program, it can be used for engineering calculation of the friction drag and heat transfer coefficients on airfoil surface. RANSFOIL reads airfoil coordinates from a 1D XYZ file as only input, then outputs grid and solution files in 2D PLOT3D format to record grid coordinates and airflow data and a report file to show aerodynamic parameters.
Simulation, analysis, and management of the movement of water
Please see the “Files” link above to download different versions. The One-Water Hydrologic Flow Model (MODFLOW-OWHM, MODFLOW-ONE) is an integrated hydrologic flow (IHM) model that is an enhanced fusion of multiple MODFLOW (MF) versions. While maintaining compatibility with existing MF versions, MF-OWHM includes: linkages for coupled heads, flows, and deformation; facilitation of self-updating models, additional observation and parameter options for higher-order calibrations; and redesigned code for faster simulations. MF-OWHM represents a complete IHM that fully links the movement and use of groundwater, surface water, and imported water for consumption by agriculture and natural vegetation on the landscape, and for potable and other uses. This provides the foundation needed to address integrated hydrologic problems such as evaluation of conjunctive-use alternatives, sustainability analysis, including potential adaptation and mitigation strategies, and best management practices.
A free Fortran 2008, 2015 coarrays course with notes and exercises
Coarrays are a feature of standard Fortran since 2008 standard. The 2015 standard adds a lot of functionality, e.g. collectives, teams, events. Coarrays are used extensively in the CGPACK library (http://cgpack.sf.net) and other projects. The course is aimed at experienced Fortran users. Working knowledge of Fortran is assumed. The course is designed for a 1 day study with an instructor. Multiple exercises with full solutions are accompanied by notes in PDF or HTML. We teach this course to staff and students at the University of Bristol, UK, as part of the set of HPC courses offered to HPC users at Bristol. Exercises have been verified with Intel and GCC/OpenCoarrays. All course materials are released under BSD license. We welcome contributions, provided you are happy to release your work under BSD license. We also welcome comments and problem reports. Contact CMPLX Engineering (http://cmplx.uk) if you want us to deliver this course to your organisation.
A collection of lecture notes and accompanying code on micromechanics
The collection MICROMECHANICS (micromechanics.zip) includes: (1) lecture notes (microbook.pdf) on the analysis of heterogeneous materials and homogenization, and (2) source codes (microcode.tar.bz2) that accompany the computational exercises in Part II of the notes. Instructions on using the codes are given in the README file of each exercise. Further instructions can be found in the file microcode.tar.bz2. The MATLAB codes are used for visualization, evaluating analytical bounds and estimates as well as in the generation of digital and particulate microstructures. The Fortran codes are based on the finite element method in linear and nonlinear settings, the latter capable of finite deformations with damage. The underlying theory is outlined in the lecture notes. -- İlker Temizer Assistant Professor Department of Mechanical Engineering Bilkent University 06800 Bilkent, Ankara Turkey
is a molecular viewer & model builder for quantum chemistry programs. It has an interface with NWChem, CP2K and PC GAMESS/Firefly quantum programs. http://www.biomolecular-modeling.com/Products.html
Fortran library to compute positions of celestial bodies
libTheSky is a Fortran library to compute positions of celestial bodies (Moon, planets, stars) and events (conjunctions, eclipses). It forms the core of the software that produces the Dutch popular-astronomy website http://hemel.waarnemen.com
Fortran library with the Abaqus user material subroutines UMAT/VUMAT
This library contains several of user material subroutines for implicit quasi-static (UMAT) and explicit dynamic (VUMAT) versions of the Abaqus solver. The project web site: http://abumpack.sf.net. The Abaqus is a proprietary finite element (FE) code ( http://www.3ds.com/products-services/simulia/products/abaqus/). Users can write subroutines for use with the Abaqus. Linear elastic, isotropic hardening plasticity, Gurson-Tvergaard-Needleman (GTN), Rousselier constitutive models are provided. Quote this code as: A. Shterenlikht, N. A. Alexander, Levenberg-Marquardt vs Powell's dogleg method for Gurson-Tvergaard-Needleman plasticity model, Computer Methods in Applied Mechanics and Engineering 237-240:1-9 (2012). DOI: http://dx.doi.org/10.1016/j.cma.2012.04.018
A collection of Fortran interfaces to the most common Open Source GIS libraries, plus some more Fortran-specific tools.
Nonlinear Krylov acceleration of fixed-point and Newton-like methods
Nonlinear Krylov Acceleration (NKA) is a method for accelerating the convergence of fixed-point (Picard) iterations. Many Newton-like and inexact Newton methods are fixed point iterations. The NKA project provides the canonical implementation of the method for several programming languages. The black-box accelerator is simple to integrate into existing code. Placed in the iteration loop, it observes the sequence of solution updates and replaces them with improved updates using information it has gleaned from previous solution iterates. It was only recently recognized (2011) that NLK is essentially equivalent to Anderson Acceleration for a specific choice of mixing parameter. NLK was independently devised in the late 1980's using a very different approach, and though it leads to the same algebraic method, NLK's organization is somewhat different, and arguably superior. The NLK approach also provides clear rationale for the proper choice of Anderson's arbitrary mixing parameter.
Structural Analysis Program for Civil Engineering.Can evaluate structures for static or dynamic seismic analysis. Dynamic analysis is made by accelerograms. Any analysis can be linear or non linear.
Polycrystalline evolution simulation library in Fortran 2018 coarrays
CGPACK (aka CASU) is a Fortran 2018 cellular automata library for HPC systems and supercomputers. It can be used for simulating microstructure, deformation and fracture in heterogeneous materials. CASU project page: http://cgpack.sf.net. If you use the library, please reference it as: A. Shterenlikht, L. Margetts, Three-dimensional cellular automata modelling of cleavage propagation across crystal boundaries in polycrystalline microstructures, Proc. Roy. Soc. A 471:20150039, DOI: http://dx.doi.org/10.1098/rspa.2015.0039. The CGPACK library has been successfully linked with MPI FE library ParaFEM, for a multi-scale multi-physics cellular automata finite element (CAFE) framework, http://parafem.org.uk. CGPACK can be used with Cray, Intel and GCC/OpenCoarrays compilers, http://opencoarrays.org. Scaling up to 32,000 cores has been demonstrated. If you are new to Fortran coarrays, have a look at our free coarrays course: http://coarrays.sf.net.
Manufactured Analytical Solution Abstraction (MASA): a library for applying the Method of Manufactured Solutions to verification of numerical software used for solving systems of nonlinear algebraic and differential equations.
Numerikus is an attempt to build a set of numerical libraries written in C/C++, Fortran, Java and C# for single processor and multi-core processors. It wil have from basic functions to Linear Algebra solvers and ODE's and PDE's methods.
The OpenFEZ project aims to provide software development kit needed for the creation of finite element software. It is written in object oriented Fortran 2003, and developed as part of a lecture held at the Institute for Statics and Dynamics of Aerospace Structures at the University of Stuttgart, Germany. The main purpose of this code is to allow students to develop a better understanding of the mathematical and numerical theories behind modern finite element codes. It is published under the Educational Community License, Version 2
A library for handling vectors, tensors, and more.
VectTens is an object-oriented numerical library designed to manipulate vectors, tensors, and other mathematical quantities in a simple and efficient manner.
Stress intensity factor (SIF) calculation from crack tip displacements
The code implements Muskhelishvili's complex function approach to calculate 2D stress intensity factors (modes I+II) from crack tip displacement fields. Surface displacements can be used with a plane stress elastic model. The code uses power/Fourier series expansion and a conformal mapping of an ellipse onto a circle.
Display FEM (finite element method) grids. scroll, zoom, different colorings, sort them to increase cache efficiency and many other features
Fortran codes for SCNURS method - Side Cut Non-Uniform Residual Stress
SCNURS - Side Cut Non-Uniform Residual Stress measurement method for plates, - is a destructive RS measurement method developed in Moscow, Russia and later in Bristol, UK. The method is specifically designed for the measurement of highly non-uniform RS fields, including discontinuities, in plates. This project collects all codes which implement forward and inverse solution to the RS problem. The codes are in modern Fortran with OpenMP. The codes are distributed under 2-clause BSD license. The code uses Lapack (http://netlib.org/lapack), Slatec (http://www.netlib.org/slatec) and CMLIB (http://gams.nist.gov/cgi-bin/serve.cgi/Package/CMLIB) libraries. All these libraries are available as packages on FreeBSD. Another project page: http://eis.bris.ac.uk/~mexas/scnursweb