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Title: Modular Aquatic Simulation System 1D

Abstract

MASS1 simulates open channel hydrodynamics and transport in branched channel networks, using cross-section averaged forms of the continuity, momentum, and convection diffusion equations. Thermal energy transport (temperature), including meteorological influences is supported. The thermodynamics of total dissolved gas (TDG) can be directly simulated. MASS1 has been developed over the last 20 years. It is currently being used on DOE projects that require MASS1 to beopen source. Hence, the authors would like to distribute MASS1 in source form.

Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Battelle Memorial Institute, Pacific Northwest Division (PNNL)
OSTI Identifier:
1352157
Report Number(s):
MASS1; 005233MLTPL00
Battelle IPID 31097-E
DOE Contract Number:
AC05-76RL01830
Resource Type:
Software
Software Revision:
00
Software Package Number:
005233
Software CPU:
MLTPL
Open Source:
Yes
PNNL is making available on GitHub to support projects
Source Code Available:
Yes
Related Software:
Python and Perl scripts are included in the source for pre- and post-processing. A simple graph plotting tool can be used to examine simulation results (Excel, Gnuplot, Tecplot, etc.). Geographic Information System (GIS) software is helpful for developing input data, but not required.
Country of Publication:
United States

Citation Formats

. Modular Aquatic Simulation System 1D. Computer software. https://www.osti.gov//servlets/purl/1352157. Vers. 00. USDOE. 19 Apr. 2017. Web.
. (2017, April 19). Modular Aquatic Simulation System 1D (Version 00) [Computer software]. https://www.osti.gov//servlets/purl/1352157.
. Modular Aquatic Simulation System 1D. Computer software. Version 00. April 19, 2017. https://www.osti.gov//servlets/purl/1352157.
@misc{osti_1352157,
title = {Modular Aquatic Simulation System 1D, Version 00},
author = {},
abstractNote = {MASS1 simulates open channel hydrodynamics and transport in branched channel networks, using cross-section averaged forms of the continuity, momentum, and convection diffusion equations. Thermal energy transport (temperature), including meteorological influences is supported. The thermodynamics of total dissolved gas (TDG) can be directly simulated. MASS1 has been developed over the last 20 years. It is currently being used on DOE projects that require MASS1 to beopen source. Hence, the authors would like to distribute MASS1 in source form.},
url = {https://www.osti.gov//servlets/purl/1352157},
doi = {},
year = {Wed Apr 19 00:00:00 EDT 2017},
month = {Wed Apr 19 00:00:00 EDT 2017},
note =
}

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  • The Modular Aquatic Simulation System in Two Dimensions (MASS2) is a two-dimensional, depth-averaged hydrodynamics and transport model. The model simulates time varying distributions of depth-averaged velocities, water surface elevations, and water quality constituents. MASS2 uses a structured, multi-block, boundary-fitted, curvilinear computational mesh, which allows the simulation of very complex riverine or estuarine networks. The blocks may be of varying resolution, which allows high resolution to be used only where needed. MASS2 can simulate a wide variety of hydrodynamic conditions, including supercritical flow and hydraulic jumps. It can also simulate a wide variety of water quality conditions, including sediment, conservative ormore » decaying contaminants, sediment-sorbed contaminants, water temperature, and total dissolved gas. Any number of these constituents may be simulated simultaneously. In addition, transport simulations may be performed using pre-calculated hydrodynamic conditions, allowing long-term transport simulations unencumbered by the more intensive hydrodynamic calculations, or repeated transport simulations without re-simulating hydrodynamics. This report documents the theory and numerical methods used in MASS2. In addition, the results are presented from several of hydrodynamic and transport validation tests to which MASS2 was subjected. The companion user manual documents the application of MASS2.« less
  • The Modular Aquatic Simulation System in Two Dimensions (MASS2) is a two-dimensional, depth-averaged hydrodynamics and transport model. The model simulates time varying distributions of depth-averaged velocities, water surface elevations, and water quality constituents. This manual documents the use of MASS2. It is the second of two reports on MASS2. The first report documents the theory and numerical methods used in MASS2, and is often referred to herein as the Theory Manual. MASS2 is applicable to a wide variety of environmental analyses of rivers and estuaries where vertical variations in the water column are negligible or unimportant.
  • Two dimension, depth-averaged hydrodynamic and transport model.
  • The variable-order, variable-step size integration algorithm of C. W. Gear as implemented by A. C. Hindmarsh has been installed as the first-line temporal integrator of the DSS/2 dynamic simulation code. This algorithm is implicit for stiff systems, and the implementation by Hindmarsh is based on a banded specification of the ODE system Jacobian matrix. Several options of the integrator may easily be called, but the diagonal approximation (Hindmarsh MF = 23) has been implemented within DSS/2 as integrators 15 and 16 (integrators 1 to 14 are classical Runge Kutta algorithms). The diagonal approximation has been used successfully on a seriesmore » of test problems, and then applied to the methanation section simulation consisting of 126 ODEs. The results of this simulation are discussed in some detail. The physical properties package was received from the Purdue University Group and was modified, as required, to be implemented on the Lehigh CDC computer. The data base alone was tested successfully with the steady-state methanation simulation. Results were identical with those utilizing the special purpose package built into the methanator model. The data base, data-loading subroutine, and all the subroutines associated with heat capacity, heat of reaction, and chemical equilibrium constant were tested successfully with the steady-state methanation simulation. The results were similar to those using the built-in, ideal-gas-thermodynamics, special-purpose package. Computation time was longer, but that is to be expected from a general-purpose package.« less
  • The transportability of a prototype DSS/2 system was demonstrated by installation on the IBM 360/195 at Oak Ridge National Laboratory and the UNIVAC 1108 at ERDA-Aberdeen. The prototype DSS/2 system was also sent to six other computer centers, and there has been no indication of installation problems. Detailed implicit integration algorithm testing has concluded, at least temporarily, with GEARB:Diagonal Approximation to the System Jacobian Option the preferred implicit algorithm. The GEARB/Dynamic Methanator Model combination has been tuned for efficient integration and considerable experience gained. Stiffness and numerical instability are separate phenomena, at least in the case of the methanator. GEARBmore » successfully integrates the stiff methanator model. Some artificial excursion limiting is necessary to suppress unstable tendencies during the first few time steps. Complete transients in temperature and composition can be obtained for the methanator starting with constant initial profiles. Other changes, such as starting with a steady-state profile and reducing the flow rate can be integrated. The steady-state profiles obtained by letting the dynamic solution run agree with the independently determined steady-state profiles.« less

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