Consider the visualization of ground vortex flow in Fig. P11-29C. Are we seeing streamlines, streaklines, pathlines, or timelines? Explain.
Visualization of ground vortex flow. A high-speed round air jet impinges on the ground in the presence of a free-stream flow of air from left to right. (The ground is at the bottom of the picture.) The portion of the jet that travels upstream forms a recirculating flow known as a ground vortex. The visualization is produced by a smoke wire mounted vertically to the left of the field of view.
Photo by John M. Cimbala.
Step 1 :
In this question, we need to find the type of the flow line and explain the reason for the choice