HR: 0830h
AN: H21D-0839    [PDF]
TI: Navier-Stokes Modeling of Gas, Moisture, Droplet, and Heat Flow in Yucca Mountain Project (YMP) Emplacement Drifts
AU: * Hao, Y
EM: hao1@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Nitao, J J
EM: nitao1@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Glascoe, L G
EM: glascoe@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Sun, Y
EM: sun4@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Buscheck, T A
EM: buscheck1@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Lee, K H
EM: lee23@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AU: Gansemer, J
EM: gansemer1@llnl.gov
AF: Lawrence Livermore National Laboratory, P.O. Box 808, L-646, Livermore, CA 94551 United States
AB: The performance of the engineered barrier system (EBS) within the emplacement drifts depends on coupled processes that involve the flow of moisture, gas and water droplets in large open cavities, liquid-film flow on the rock and engineered-material surfaces, fluid and gas migration in fractured, porous materials, and the chemical interactions between all in situ and emplaced materials. However, with the exception of recent heat-transfer analyses using the FLUENT code, virtually all of the in-drift modeling studies for the proposed repository at Yucca Mountain have used porous-medium Darcy-flow approximations. Conservative assumptions are thus required in Total System Performance Assessment (TSPA) to compensate for the abstracted, approximate representation of materials interactions and thermal-hydrological-chemical (THC) processes. This study is focused on achieving more rigorous representation of the in-drift environment with Navier-Stokes modeling of in-drift flow processes (natural convection, realistic gas/moisture movement, film/droplet formation and flow, reactive chemical transport, etc.). The simulations are carried out by finite-element version of the NUFT code, with full Navier-Stokes representation of humidity distribution, droplet and film flow, gas-chemistry evolution, and gas migration within the drifts and at the interface with the invert and host rock. The results of these simulations can be used to test the adequacy of the in-drift coupled-process models being used in the TSPA. This work was performed under the auspices of the U.S. Department of Energy by University of California Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48.
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 1875 Unsaturated zone
SC: Hydrology [H]
MN: 2003 Fall Meeting