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A Partitioned Global Address Space Parallel Code for Numerical Modeling in Special Relativistic Hydrodynamics.

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Title: A Partitioned Global Address Space Parallel Code for Numerical Modeling in Special Relativistic Hydrodynamics.
Authors: Kulikov, I. M., Chernykh, I. G., Karavaev, D. A., Elbakyan, V. G., Abaroa, L., Romero, G. E.
Source: Lobachevskii Journal of Mathematics; Sep2025, Vol. 46 Issue 9, p4356-4392, 37p
Subject Terms: SPECIAL relativity (Physics), HYDRODYNAMICS, PARALLEL programming, HIGH performance computing, INTERSTELLAR medium
Abstract: In this paper, a new relativistic hydrodynamic code based on the Partitioned Global Address Space model of parallel computations is proposed. To implement this model, a combination of the parallel programming technologies Coarray Fortran for interprocess communications and OpenMP for multithreaded execution is used. The joint use of these technologies allows obtaining a code which can be easily implemented in software and has very high performance. For efficient use of such technologies, an original numerical method for solving the equations of special relativistic hydrodynamics has been developed. A detailed description of the construction, verification, and parallel implementation of the numerical method is given. A study of the performance and efficiency of the code has shown that it is comparable with the MPI applications, while its software implementation is much easier. This parallel code is used to simulate the interaction of a relativistic wind with clouds in the interstellar medium. [ABSTRACT FROM AUTHOR]
Copyright of Lobachevskii Journal of Mathematics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A Partitioned Global Address Space Parallel Code for Numerical Modeling in Special Relativistic Hydrodynamics.
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  Data: <searchLink fieldCode="AR" term="%22Kulikov%2C+I%2E+M%2E%22">Kulikov, I. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Chernykh%2C+I%2E+G%2E%22">Chernykh, I. G.</searchLink><br /><searchLink fieldCode="AR" term="%22Karavaev%2C+D%2E+A%2E%22">Karavaev, D. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Elbakyan%2C+V%2E+G%2E%22">Elbakyan, V. G.</searchLink><br /><searchLink fieldCode="AR" term="%22Abaroa%2C+L%2E%22">Abaroa, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Romero%2C+G%2E+E%2E%22">Romero, G. E.</searchLink>
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  Data: Lobachevskii Journal of Mathematics; Sep2025, Vol. 46 Issue 9, p4356-4392, 37p
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  Data: <searchLink fieldCode="DE" term="%22SPECIAL+relativity+%28Physics%29%22">SPECIAL relativity (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22HYDRODYNAMICS%22">HYDRODYNAMICS</searchLink><br /><searchLink fieldCode="DE" term="%22PARALLEL+programming%22">PARALLEL programming</searchLink><br /><searchLink fieldCode="DE" term="%22HIGH+performance+computing%22">HIGH performance computing</searchLink><br /><searchLink fieldCode="DE" term="%22INTERSTELLAR+medium%22">INTERSTELLAR medium</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this paper, a new relativistic hydrodynamic code based on the Partitioned Global Address Space model of parallel computations is proposed. To implement this model, a combination of the parallel programming technologies Coarray Fortran for interprocess communications and OpenMP for multithreaded execution is used. The joint use of these technologies allows obtaining a code which can be easily implemented in software and has very high performance. For efficient use of such technologies, an original numerical method for solving the equations of special relativistic hydrodynamics has been developed. A detailed description of the construction, verification, and parallel implementation of the numerical method is given. A study of the performance and efficiency of the code has shown that it is comparable with the MPI applications, while its software implementation is much easier. This parallel code is used to simulate the interaction of a relativistic wind with clouds in the interstellar medium. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of Lobachevskii Journal of Mathematics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S1995080225611051
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      – Code: eng
        Text: English
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      – SubjectFull: HYDRODYNAMICS
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      – SubjectFull: PARALLEL programming
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      – SubjectFull: HIGH performance computing
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      – SubjectFull: INTERSTELLAR medium
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      – TitleFull: A Partitioned Global Address Space Parallel Code for Numerical Modeling in Special Relativistic Hydrodynamics.
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              M: 09
              Text: Sep2025
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