Polygon

Remove the polygon option. Ignoring the fact that you are tossing 2-dimensional shapes into 3 dimensional air, the fact remains that a polygon with a sufficiently large number of sides would have less drag than a circle at the right Reynolds number. (Consider golf ball dimples, and that laminar flow has more drag than turbulent flow.)

Comments for Polygon

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
Polygon
by: Anonymous

If we say that this drag problem is really asking about 2 d flow, then we can discuss it further. One could argue that an airfoil could be a polygon, even if the segments were straight lines. Then this polygon could have less drag than some circle. BTW I don't know where the confusion came in, but laminar flow creates less drag than turbulent flow, not vice versa. The dimples on a golf ball, among other things, gives energy to the flow, which delays separation. Separated flow creates a lot of drag. In addition to separation, the dimples help generate lift through magnus forces, and help with the ball's stability by helping fix the stagnation points on the ball.

If anyone is curious as to why other things, like planes, aren't covered with dimples, then read this:

http://www.aerospaceweb.org/question/aerodynamics/q0215.shtml

To sum it up, the wings on a plane are a more efficient shape than a sphere, and dimples are unnecessary.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to views.

Recent Articles

  1. 7 Ninja Tips to Avoid Scholarship Scams

    Dec 10, 18 04:09 PM

    Scholarship scams are prevalent nowadays. However, a few Ninja Tips can save you from financial loss. They can save your hours of the wasted search as well.

    Read More

  2. People lie about their IQ

    Oct 30, 18 04:18 PM

    When I was in college taking a statistics course, the professor began by discussing IQ distributions. He asked people in the class to raise their hand

    Read More

  3. Your math is flawed

    Jul 31, 18 03:24 PM

    According to your chart: 95% of IQ scores fall between 70 and 130 Which means that 5% of the population is distributed in either scores below 70 or above

    Read More