Code Verification of a Warm Electron Diode Using the EMPIRE Plasma Simulation Code.
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
This report documents recent code verification exercises for a warm electron diode problem using the EMPIRE plasma code. This computationally expensive test was performed three times, including two different code versions and two different time integration algorithms, and the resulting code responses were analyzed for convergence to the analytical solution and orders-of-convergence using the StREEQ numerical error estimation tool. Significant deviations from the exact solution and expected orders-of-convergence, as well as changes in code behavior over time and due to choice of time integration algorithm were observed, illustrating the need to fix fundamental code issues as well as additional code verification testing before the code can be relied upon to accurately solve critical problems within its application space.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
- DOE Contract Number:
- AC04-94AL85000; NA0003525
- OSTI ID:
- 1762913
- Report Number(s):
- SAND--2019-8669; 677824
- Country of Publication:
- United States
- Language:
- English
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