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Title: Introduction to PFLOTRAN.

Abstract

Abstract not provided.

Authors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1399303
Report Number(s):
SAND2016-10002PE
648045
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Carlsbad Field Office DOE-EM held September 27, 2016 in Carlsbad, NM.
Country of Publication:
United States
Language:
English

Citation Formats

Hammond, Glenn Edward. Introduction to PFLOTRAN.. United States: N. p., 2016. Web.
Hammond, Glenn Edward. Introduction to PFLOTRAN.. United States.
Hammond, Glenn Edward. 2016. "Introduction to PFLOTRAN.". United States. doi:. https://www.osti.gov/servlets/purl/1399303.
@article{osti_1399303,
title = {Introduction to PFLOTRAN.},
author = {Hammond, Glenn Edward},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month =
}

Conference:
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  • We describe PFLOTRAN, a recently developed code for modeling multi-phase, multicomponent subsurface flow and reactive transport using massively parallel computers. PFLOTRAN is built on top of PETSc, the Portable, Extensible Toolkit for Scientific Computation. Leveraging PETSc has allowed us to develop--with a relatively modest investment in development effort--a code that exhibits excellent performance on the largest-scale supercomputers. Very significant enhancements to the code are planned during our SciDAC-2 project. Here we describe the current state of the code, present an example of its use on Jaguar, the Cray XT3/4 system at Oak Ridge National Laboratory consisting of 11706 dual-core Opteronmore » processor nodes, and briefly outline our future plans for the code.« less
  • We describe PFLOTRAN - a code for simulation of coupled hydro-thermal-chemical processes in variably saturated, non-isothermal, porous media - and the approaches we have employed to obtain scalable performance on some of the largest scale supercomputers in the world. We present detailed analyses of I/O and solver performance on Jaguar, the Cray XT5 at Oak Ridge National Laboratory, and Intrepid, the IBM BlueGene/P at Argonne National Laboratory, that have guided our choice of algorithms.
  • PFLOTRAN a massively parallel computer code for modeling coupled hydro-thermal-chemical processes in variably saturated, non-isothermal porous media is applied to sequestration of supercritical CO{sub 2} in deep geologic formations. Two different methods of solution to the governing partial differential equations are implemented referred to as variable switching and the flash approach. Variable switching entails choosing the independent variables according to the set of phases present in a control volume, whereas in the flash approach a persistent set of variables are used through the calculation. The features and performance of the two approaches are described and contrasted in regard to stabilitymore » and convergence, flexibility of choice of solver, and scaling behavior.« less
  • Abstract not provided.