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First, a control experiment, using water, was performed to allow us to see normal pressure readings without any clog being present. These pressure readings will serve as a basis for comparison when we begin to run alum through our system. The pressure results from pressure sensor 1 can be seen in the graph below.
align=center Graph 1: Pressure sensor 1 readings
Next, alum was used in order to determine the time it would take for a clog to form in our .1 cm orifice. The experiment was run for four days but the most conclusive data was seen within the first hours. The pressure readings, from pressure sensor 1, are shown in Graph 2 below.
align=center Graph 2: Pressure sensor 1 readings
As can be seen from the graph there is a large spike in the pressure readings about 4 hours after beginning the test. The pressure sensor reads a higher and higher pressure, due to the clogging orifice, until the it builds up enough to "blow out" the clog.
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