Machine-translated by Google. Questions are authored in English.
Top

Discussion

The wake behind a bluff body is characterised by

  • A.Purely laminar flow at all Reynolds numbers
  • B.Near base pressure, with a momentum deficit
  • C.A pressure above the free-stream value
  • D.No velocity deficit at all

Answer: B

Once the flow separates, the pressure in the wake cannot recover to the free-stream value and sits near the base pressure, leaving the front of the body pushed harder than the rear. Measuring the momentum deficit across the wake is in fact a standard way of determining the drag experimentally.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.