Vadose zone flow convergence test suite
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Performance Assessment (PA) simulations for engineered disposal systems at the Savannah River Site involve highly contrasting materials and moisture conditions at and near saturation. These conditions cause severe convergence difficulties that typically result in unacceptable convergence or long simulation times or excessive analyst effort. Adequate convergence is usually achieved in a trial-anderror manner by applying under-relaxation to the Saturation or Pressure variable, in a series of everdecreasing RELAxation values. SRNL would like a more efficient scheme implemented inside PORFLOW to achieve flow convergence in a more reliable and efficient manner. To this end, a suite of test problems that illustrate these convergence problems is provided to facilitate diagnosis and development of an improved convergence strategy. The attached files are being transmitted to you describing the test problem and proposed resolution.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River Ecology Lab. (SREL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC09-08SR22470
- OSTI ID:
- 1361662
- Report Number(s):
- SRNL-STI-2017-00348
- Country of Publication:
- United States
- Language:
- English
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