Experimental Data

Below is the data collected on 1/31/12 using the flow tunnel in AR-123 of TCNJ campus.

The purpose of this experiment was to verify the predicted force equations on a barrier blocking a flow of water.

  1. The first step was to fill the water tunnel with 1.5" of water, then to run the water at the speed setting 5.
    • The velocity was recorded by using a stopwatch and a ruler to examine the flow of dye in the water.
    • Then, barriers were used to block the flow of water. The barriers were attached to a spring scale to measure the force values.
  2. Next, Step 1 was repeated for speed settings of 6 and 7
  3. Steps 1 and 2 were repeated with water heights of 2", 3", 3.5" and 4"

    In this table, we can see the setup of the many experiments run in the water tunnel. Each different row corresponds to various depths of water, as well as various flow velocities. Included are the three time trials used to calculate the measured velocity of the flow. D represents the depth of the flow, and W represents the width of the tunnel, constant at 6" or 0.5 ft.

    Here is a table depicting the measured forces on the metal barrier, measured in lbf. There forces are in rows based on the water depth and flow velocity, and placed in columns based on the height of the metal barrier subject to that flow.

    Using the measured data, the correlation between these measured forces and the forces predicted by the equations was created. To see the derivation of the force equations, follow this link: Derivation of the Force Equations. Below are the graphs, including a line of best fit of the data.