Fig. 3. Schematic of (a) Center for Nuclear Waste Regulatory Analyses heater experiment and (b) simulation domain with finite volume grid. The simulation domain—reduced to one-quarter of the laboratory test cell—is rotated around the z-axis to allow for better visualization. The local coordinate system of the simulation domain is located at the top of the test cell in the center of the liquid-release cylinder. The y-axis is aligned with the drift axis.