Projects

Piernik

PIERNIK is an MHD code created at Centre for Astronomy, Nicolaus Copernicus University. Current version uses a simple, conservative numerical scheme, which is known as Relaxing TVD scheme (RTVD). General mathematical context of the relaxation and relaxing systems of hyperbolic conservation laws, and ... [More] related numerical schemes, was presented by Jin & Xin (1995). A particular realization of the RTVD was developed by Trac & Pen (2003) and Pen et al. (2003), who presented the numerical method in a pedagogical way, and provided short, publicly available HD and MHD codes. These codes rely on a dimensionally split, second order algorithm in space and time. The Relaxing TVD scheme is easily extendible to account for additional fluid components: multiple fluids, dust, cosmic rays, self-gravity. [Less]

ToSCo

ToSCo is a set of scientific computing programs, mainly for processing geophysical data. This project is associated to GêBR project. More about of GêBR is available at GêBR Home Page.

CFD General Notation System (CGNS)

The CFD General Notation System (CGNS) provides a standard for recording and recovering computer data associated with the numerical solution of fluid dynamics equations. Current source is available by SVN, although only the downloads are supported.

RubyInline

Ruby Inline is an analog to Perl's Inline::C. Out of the box, it allows you to embed C/++ external module code in your ruby script directly. By writing simple builder classes, you can teach how to cope with new languages (fortran, perl, whatever).

tab_calc

This is a simple software for performing various statistical and mathematicaloperations on single ASCII data-files. Entire file is read into anarray, which is then analyzed. Number of columns is detected automatically.

openstem

A program simulates STEM(Scanning Transmission Electron Microscope) image based on Multislice method. The simulation includes STEM Bright Field, Dark Field and High Angle Annular Dark Field image. Thermal Diffuse Scattering is included by frozen lattice method or absorptive potential which is ... [More] proposed by Kazuo Ishizuka. Programs for High Resolution TEM simulation are also developing now. [Less]

cameron

I am an Water Resources Engineering Graduate student at University of Colorado at Boulder and this is a code repository for my school and work code.

yaxx

XML stands for eXensible Markup Language. YAXX is an XML extension to YACC, which stands for 'Yet Another Compiler-Compiler'. This extension allows a program in a YACC grammar (LALR) to be automatically converted into an XML document that encodes the syntax tree of the program. Moreover, the ... [More] generated XML document can be validated by a generated DTD (Document Type Description) document. The resulting syntax tree in XML can also be transformed back into the original program through a very simple XSLT stylesheet. The implementation of YAXX is based on an extension to Bison, a public-domain implementation of YACC. The software collects a number of YACC grammars and reference parsers to support the parsing of all major programming languages, including ANSI C, Fortran 77, GNU C++, Java, C#, Ada 95, PHP5, XML, SQL, etc. The original hosting site of the project in SourceForge is still functioning for the release of the tarballs. Developers are encouraged to switch to the new repository hosted here. [Less]

nh3d

A coupled mesoscale object-oriented model Developed using original Fortran code of NH3D model by : P. Miranda, M. Teixeira, R. Room, et al. (Univ. Reading, Lisbon and Tartu), V. Stepanenko (Moscow State University) ContentsMotivation Overview Equations Active Work References MotivationOverview ... [More] The model includes : The 1-dimensional lake model - Lake [6] The atmosphere shortwave (Clirad-SW) and longwave (Clirad-LW) solar radiation, [7-8] The specific aerosol advection-diffusion - SmolarkiewiczTEScheme - an object-oriented implementation of MPDATA [9] EquationsThe model solves the set of atmosphere hydro-thermodynamics equations in sigma-coordinates defined in [1-5] : Here t — time, x, y — horizontal coordinates, σ = (p - pt) / (psurf - pt) — vertical σ-coordinate, other variables and notations see in Model Definitions. (1) - (3) are the flow equations, (4) — the heat transfer equation, (5) — the continuity equation, (6) - (8) — equations for atmospheric moisture (vapour, rain and cloud drops). Values of Di, where i = u,v,w,Ѳ,… define the turbulence diffusion of the corresponsing variables, Ri, i = u,v,w,Ѳ,… — an additional terms denoting external driving forces. Thermodynamical variables are measured in mesoscale deviations from the background state. Applying the divergence operator to (1) - (3), as shown in [1] leads to : where L and M are the 2nd order linear differential operators, and f = f(x,y,σ). Active WorkReferencesP. M. Miranda. Gravity waves and wave drag in flow past three dimensional isolated mountains. - Phd Thesis, University of Reading, 1990, 191 pp. M. A. Teixeira, and P. M. Miranda. The introduction of warm rain microphysics in the NH3d atmospheric model. - Technical report, University of Lisbon, 1997, pp. 22. M. J. Miller, and A. A. White. On the non hydrostatic equations in pressure and sigma coordinates. Quart. J. R. Met. Soc., Vol. 110, 1984, pp. 515 - 533. В. М. Степаненко, П. М. Миранда, В. Н. Лыкосов. Численное моделирование мезомасштабного взаимодействия атмосферы и гидрологически неоднородной суши. - Вычислительные технологии. 2006. Т. 11. Избранные доклады Международной конференции по измерениям, моделированию и информационным системам для изучения окружающей среды: ENVIROMIS-2006 (Томск, Россия), часть 3. С. 118-127. В. М. Степаненко. Численное моделирование взаимодействия атмосферы с водоемами суши. Диссертация на соискание ученой степени кандидата физико-математических наук. Москва, 2007. 153 с. E. Dutra, V. Stepanenko, P. A. Miranda, P. Viterbo, D. Mironov, V. N. Lykosov. Evaporation and seasonal temperature changes in lakes of the Iberian Peninsula. - Proc. of the 5th Portuguese-Spanish Assembly of Geophysics and Geodesy, Sevilha, 2006. Chou, M.-D., M.J. Suarez, X.Z. Liang, and M.M.-H. Yan A thermal infrared radiation parameterization for atmospheric studies. - Technical report series on global modeling and data assimilation, NASA/TM-2001-104606, Vol. 19, 55 pp. Chou, M.-D., and M.J. Suarez, 2002: A solar radiation parameterization for atmospheric studies. - Technical report series on global modeling and data assimilation, NASA/TM-1999-10460, Vol. 15, 42-42. P. K. Smolarkiewicz, Len G. Margolin. MPDATA: A Finite-Difference Solver for Geophysical Flows. - Journal of Computational Physics, 1998, v. 140, p. 459-480. [Less]

mst-phys-yamilov

MST Physics Yamilov group. Fortran90, MPICH, matlab