Changes between Version 104 and Version 105 of WikiStart


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Timestamp:
Sep 28, 2016, 10:03:47 AM (4 years ago)
Author:
davarpan1s
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  • WikiStart

    v104 v105  
    143143Density measurements of the samples showed that the density in the mixing tank on the third floor and tank D were equal (19 km/m3). However, there was a major decrease of density in the inlet box (max density = 14.8 kg/m3). Density of inlet box needs further investigation.
    144144
    145 fixstr1_2609b: Goal was to determine flushing characteristics of the inlet box, and how long it takes to reach steady-state density conditions. Running basal ADV at 5 positions in the bottom cross section only at traverse positions y = 0.016, 0.116, 0.216, 0.316 and 0.416 m (with 5 repetitions).  GoPro cameras were mounted at different positions including one inside the inlet box (front left corner, looking downstream), one outside the Coriolis tank looking upstream at the end of the channel and one overhead looking down (birds-eye-view) at the two curves, from the level of the computer centre. Dye was released to visualize the flow. One set of 12 siphon samples (duration = 1 min) was taken 5 minutes after flow rate stabilized. 
     145fixstr1_2609b: Goal was to determine flushing characteristics of the inlet box, and how long it takes to reach steady-state density conditions. Running basal ADV at 5 positions in the bottom cross section only at traverse positions y = 0.016, 0.116, 0.216, 0.316 and 0.416 m (with 5 repetitions).  !GoPro cameras were mounted at different positions including one inside the inlet box (front left corner, looking downstream), one outside the Coriolis tank looking upstream at the end of the channel and one overhead looking down (birds-eye-view) at the two curves, from the level of the computer centre. Dye was released to visualize the flow. One set of 12 siphon samples (duration = 1 min) was taken 5 minutes after flow rate stabilized. 
    146146
    147147It took 2.5 min for the flow rate to stabilize. The ADV was initialized 5 minutes after flow stabilized. The ADV needed more seeding to improve the signal-to=noise ratio. The !GoPro in the inlet box showed a lot of mixing between the current and the ambient which explains the decrease in density in the gravity current in the inlet box. The suggestion was to reduce the inlet box volume to reduce the time to reach steady-state density (by reduce the flushing time).