Consider Cayuga Lake where the surface currents are established by the wind. Until noon the wind blows out of the east (an unusual occurrence but we'll assume it!) and a surface current of 10 cm/s toward the west is established. At noon the wind suddenly switches and comes from the north (more standard for the lake!) and we can assume a surface currently toward the south is immediately established at 15 cm/s. Suppose we have drogues and dye to put in the flow. Drogues are floats that track the current with little influence from the wind. Now, starting at 11:00 am we release a drogue every 15 minutes until noon. We also start releasing dye continuously. Accurately sketch the location of the drogues (place an x and a time next to each) and the shape of the dye trace between 11:00 am and 1:00 pm. Accurately sketch the pathlines, streaklines and streamlines of this flow.
Consider Cayuga Lake where the surface currents are established by the wind. Until noon the wind blows out of the east (an unusual occurrence but we'll assume it!) and a surface current of 10 cm/s toward the west is established. At noon the wind suddenly switches and comes from the north (more standard for the lake!) and we can assume a surface currently toward the south is immediately established at 15 cm/s. Suppose we have drogues and dye to put in the flow. Drogues are floats that track the current with little influence from the wind. Now, starting at 11:00 am we release a drogue every 15 minutes until noon. We also start releasing dye continuously. Accurately sketch the location of the drogues (place an x and a time next to each) and the shape of the dye trace between 11:00 am and 1:00 pm. Accurately sketch the pathlines, streaklines and streamlines of this flow.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Consider Cayuga Lake where the surface currents are established by the wind.
Until noon the wind blows out of the east (an unusual occurrence but we'll assume
it!) and a surface current of 10 cm/s toward the west is established. At noon the
wind suddenly switches and comes from the north (more standard for the lake!)
and we can assume a surface currently toward the south is immediately
established at 15 cm/s. Suppose we have drogues and dye to put in the flow.
Drogues are floats that track the current with little influence from the wind. Now,
starting at 11:00 am we release a drogue every 15 minutes until noon. We also
start releasing dye continuously.
Accurately sketch the location of the drogues (place an x and a time next to each)
and the shape of the dye trace between 11:00 am and 1:00 pm.
Accurately sketch the pathlines, streaklines and streamlines of this flow.
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