l7_mud

# l7_mud - Fluids Lab-1 Lecture Mud(42 respondents 1 Why is...

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Fluids Lab-1 Lecture Mud (42 respondents) 1. Why is it that p o is constant along a streamline? (1 student) We can conclude this from the equations of motion (F=ma) for a ﬂuid, after some algebra and calculus work. We will get to this later in the course. For the purposes of the upcoming Lab, we ask you to take it on faith for now. And the class tunnel demo experimentally showed that p o is indeed constant. 2. What are V and p as opposed to V and p ? (6 students) The subscript () indicates a quantity “at in±nity”, in the mathematical-limit sense. So the pressure ±eld p ( x, y, z ) near the wing asymptotes to p as we move farther and farther away. Likewise for V ( x, y, z ) and V . In practice, the pressure ±eld asymptotes very quickly, so we don’t have to move very far from the wing to get very close to p . Commonly used names for p are “freestream pressure” or “far-upstream pressure”. For

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l7_mud - Fluids Lab-1 Lecture Mud(42 respondents 1 Why is...

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