Search Results for "water"

QMCF2 is a molecular-simulation package for molecular dynamics, Monte Carlo, geometry optimization, molecular mechanics, and combined quantum-mechanical/molecular-mechanical calculations. The source includes force-field, electrostatics, constraints, thermostats, pressure control, water models, QMCF/QM-MM, external-QM interfaces, conversion tools, and analysis utilities. Interfaces are available for xTB, DFTB+, Gaussian, Turbomole, CRYSTAL, and ASE-based workflows. External programs must be installed separately. Installation: open the Code tab and download or clone the complete repository. On Linux, open a terminal in `qmcf2_installer` and run: `python3 qmcf2_installer.py3` Review the detected compilers, libraries, paths, and warnings, then start the build. ...

Open source steam property routines in C. Implements the IAPWS-IF97 steam tables from the International Association for the Properties of Water and Steam. Includes two-way property solvers and test suite. Can be used from C/C++, Fortran, Python, LabVIEW, Octave and ASCEND.

...The developed toolkit helps the researchers in following ways: 1) automating the creation of multiple input files for quantum and molecular mechanics programs, 2) automating the output analysis and 3) substitute the use of full MM programs with a faster specialized one. The developed tools include: 1) generator of molecule-water complexes with graphical user interface (GUI), 2) semi-automatic frequency analysis using symbolic potential energy distribution matrix and comparison of optimized internal coordinates, 3) GUI for charge fitting with three modes: manual, Monte-Carlo sampling or brute force, and 4) GUI for dihedral terms fitting. The usage of these tools decreases the labor effort, lowers manual input errors and reduces the time needed for accurate MM parameterization efforts.