Independent verification and validation testing of the FLASH computer code, Versiion 3. 0

Technical Report · Mon Jun 01 00:00:00 EDT 1992

DOI:https://doi.org/10.2172/7288831· OSTI ID:7288831

Martian, P; Chung, J N ^[1]

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1. Washington State Univ., Pullman, WA (United States). Dept. of Mechanical and Materials Engineering

Independent testing of the FLASH computer code, Version 3.0, was conducted to determine if the code is ready for use in hydrological and environmental studies at various Department of Energy sites. This report describes the technical basis, approach, and results of this testing. Verification tests, and validation tests, were used to determine the operational status of the FLASH computer code. These tests were specifically designed to test: correctness of the FORTRAN coding, computational accuracy, and suitability to simulating actual hydrologic conditions. This testing was performed using a structured evaluation protocol which consisted of: blind testing, independent applications, and graduated difficulty of test cases. Both quantitative and qualitative testing was performed through evaluating relative root mean square values and graphical comparisons of the numerical, analytical, and experimental data. Four verification test were used to check the computational accuracy and correctness of the FORTRAN coding, and three validation tests were used to check the suitability to simulating actual conditions. These tests cases ranged in complexity from simple 1-D saturated flow to 2-D variably saturated problems. The verification tests showed excellent quantitative agreement between the FLASH results and analytical solutions. The validation tests showed good qualitative agreement with the experimental data. Based on the results of this testing, it was concluded that the FLASH code is a versatile and powerful two-dimensional analysis tool for fluid flow. In conclusion, all aspects of the code that were tested, except for the unit gradient bottom boundary condition, were found to be fully operational and ready for use in hydrological and environmental studies.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States); Washington State Univ., Pullman, WA (United States). Dept. of Mechanical and Materials Engineering
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 7288831
• Report Number(s): EGG-GEO-10330; ON: DE92019768
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
F CODES
VALIDATION
VERIFICATION
FLUID FLOW
GROUND WATER
FORTRAN
TESTING
TWO-DIMENSIONAL CALCULATIONS
COMPUTER CODES
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PROGRAMMING LANGUAGES
WATER
540210* - Environment
Terrestrial- Basic Studies- (1990-)
420400 - Engineering- Heat Transfer & Fluid Flow
990200 - Mathematics & Computers