DNS is intractable for flows with complex geometries or flow configurations. Terrain affects surface water flow and distribution. These processes include alterations in cerebral blood flow and pressure within the skull. These pressure differences arise in conjunction with the curved air flow. At such densities, nitrogen could flow across the surface as liquid. Now water can flow, or it can crash. Each pair is able to supply half of the maximum coolant flow. Streaklines are identical to streamlines for steady flow. The average heat flow to the surroundings is . Sensors gather information on things like traffic flow and energy use. Thus, the upper mantle can only flow very slowly. To fly, air must flow over the wing and generate lift. Secondary air is mixed with the coal/primary air flow in the burners. The Koshi has an average water flow (discharge) of . The timing of a single lava flow is also undetermined.