displacement from theoretical approximation. However, comparing results from the two
different approaches were limited to the short length (from 0m to 0.035m). Experimental
verification was done to compare with the theoretical approximation. The schedule 40
PVC pipe was used for the barrel. A Piezotronics PCB pressure sensor, laser diodes and
high-speed photo detectors on the three arbitrary locations were installed to collect data.
It showed the prediction for the velocity as a function of the displacement with
experiment data.