Program title: iEBE-VISHNU
Catalogue identifier: AEYA_v1_0
Program summary URL:class="interref" data-locatorType="url" data-locatorKey="http://cpc.cs.qub.ac.uk/summaries/AEYA_v1_0.html">http://cpc.cs.qub.ac.uk/summaries/AEYA_v1_0.html
Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Ireland
Licensing provisions: Standard CPC licence, class="interref" data-locatorType="url" data-locatorKey="http://cpc.cs.qub.ac.uk/licence/licence.html">http://cpc.cs.qub.ac.uk/licence/licence.html
No. of lines in distributed program, including test data, etc.: 5257939
No. of bytes in distributed program, including test data, etc.: 262822421
Distribution format: tar.gz
Programming language: Fortran, C++, python, bash, SQLite.
Computer: Laptop, desktop, cluster.
Operating system: Tested on GNU/Linux Ubuntu 12.04 x64, Red Hat Linux 6, Mac OS X 10.8+.
RAM: 2G bytes
Classification: 17.11, 17.16, 17.20.
External routines: GNU Scientific Library (GSL), HDF5 (Fortran and C++ enabled), Numpy
Nature of problem: Relativistic heavy-ion collisions are tiny in size (class="mathmlsrc">title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0010465515003392&_mathId=si153.gif&_user=111111111&_pii=S0010465515003392&_rdoc=1&_issn=00104655&md5=25fbbc981b7bb6927eab525fa8db2532">class="imgLazyJSB inlineImage" height="14" width="95" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0010465515003392-si153.gif">class="mathContainer hidden">class="mathCode">) and live in a flash (class="mathmlsrc">title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0010465515003392&_mathId=si154.gif&_user=111111111&_pii=S0010465515003392&_rdoc=1&_issn=00104655&md5=372d3aa25491b094c620109dd3377fa1">class="imgLazyJSB inlineImage" height="14" width="91" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0010465515003392-si154.gif">class="mathContainer hidden">class="mathCode">). It is impossible to use external probes to study the properties of the quark-gluon plasma (QGP), a novel state of matter created during the collisions. Experiments can only measure the momentum information of stable hadrons, who are the remnants of the collisions. In order to extract the thermal and transport properties of the QGP one needs to rely on Monte-Carlo event-by-event model simulations, which reverse-engineer the experimental measurements to the early time dynamics of the relativistic heavy-ion collisions.
Solution method: Relativistic heavy-ion collisions contain multiple stages of evolution. The physics that governs each stage is implemented into individual code components. A general driver script glues all the modular packages as a whole to perform large-scale Monte-Carlo simulations. The final results are stored into SQLite database, which supports standard querying for massive data analysis. By tuning transport coefficients of the QGP as free parameters, e.g. the specific shear viscosity class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0010465515003392&_mathId=si45.gif&_user=111111111&_pii=S0010465515003392&_rdoc=1&_issn=00104655&md5=ff72b3a4687df7cc0e295721eafab6f5" title="Click to view the MathML source">η/sclass="mathContainer hidden">class="mathCode">, we can constrain various transport properties of the QGP through model-data comparisons.
Additional comments: !!!!! The distribution file for this program is over 260 Mbytes and therefore is not delivered directly when download or Email is requested. Instead a html file giving details of how the program can be obtained is sent. !!!!!
Running time: The following running time is tested on a laptop computer with a 2.4 GHz Intel Core i5 CPU, 4 GB memory. All the C++ and Fortran codes are compiled with the GNU Compiler Collection (GCC) 4.9.2 and -O3 optimization ( Table 1).