do the result part of Thermal Fluids lab report , about the experiment

Discharge Coefficient as function of Re

0.1450

0.1500

0.1550

0.1600

0.1650

0.1700

0.1750

0.0000

200.000

0

400.000

0

600.000

0

800.000

0

1000.00

00

1200.00

00

1400.00

00

1600.00

00

Reynolds Number

Discharge Coefficient

Figure 1: Discharge Coefficient as a function of Reynolds number

Rotameter	Virtual Rotameter	% Error
2	0.27	86.5
3	0.44	85.33
4	0.6	85
5	0.77	84.6
6	0.93	84.5

Table 2: Results of Rotameter and Virtual Rotameter with calibrated Scale Factor

After a linear fit was performed, as seen in Figure 2, the calibrated Scale Factor found was 7.059. This value was still too low, resulting in a rather high percent error of about 86 %, as shown in Table 2.

The value for Scale factor needed to be adjusted. After trial and error, the value of 6.45 was found 1000 RPM. Generally you can just open the valve until you hear a perceptible change in motor speed, and then close the valve so that data can be recorded. Record the readings of speed, force, and input power. Continue this process until the housing is empty of fluid. Note that the no-load speed of the motor should be around 1400 to

Rotameter	Virtual Rotameter	% Error
2	1.75	12.5
4	3.97	0.75
6	5.98	0.33

Table 3: Results of Rotameter and Virtual Rotameter with new calibrated Scale Factor

The new Scale Factor resulted in favorable percent errors of less than one percent with the exception of the lower flow that resulted in a percent error of 12 %.