Question

Students in a laboratory are studying air flowing at steady-state through a horizontal insulated duct. One student group reports the measured pressure, temperature, and velocity at one location in the duct as 0.95 bar, 67 °C, and 75 m/s, respectively. The group reports the following values at another location in the duct: 0.8 bar, 22 °C, and 310 m/s. The group neglected to note the direction of flow on the datasheet, however.

Using the data provided, determine the direction of flow.

Answer 1

As σ_ev cannot be negative, the assumed flow direction is wrong. Hence, the flow is from right to left (0.8 bar to 0.95 bar)

Step-by-step explanation: