Round 2: Tossup 20

For a two-phase flow, this process names a ratio defined as a ratio of superficial velocities times “one over void fraction minus one.” A fluid condition named for this process relaxes its tangential restriction to obtain another named for penetration, which applies to inviscid flows. This process names a flow regime with Knudsen numbers just below that of transitional flows, which occurs due a breakdown of the continuum approximation. (-5[1])A boundary condition that assumes that viscous fluids possess zero bulk velocity (-5[1])at solid walls is named (10[1])for the (10[1])absence (10[3])of (10[2])this process. (10[1]-5[1])This process (10[2])is absent (10[1])in a condition (-5[1])that sets rotational velocity equal (10[1])to center-of-mass velocity, such (10[1])that a contact point (10[1])with the ground has no net velocity. (-5[1])For 10 points, in introductory physics, (10[1])wheels are assumed to roll (-5[1])without what (10[1])friction-related process? (10[2])■END■ (10[3])

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