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Comment: Re:What about drag (Score 1) 127

by mercnet (#38977567) Attached to: What Scorpions Have To Teach Aircraft Designers

Surface roughness can be used to transition the boundary layer from a laminar to a turbulent flow. Early separation on an airfoil causes an increase in drag. You can trip the flow with surface roughness, suction/blowing, trip wire, etc to make it turbulent and repair the separation.

Now relating to the article I am guessing they have a turbulent boundary layer which is why sand particles are being sucked in and slammed against the blade. Having a laminar BL would prevent sand from entering it?

Comment: Get them interested in Math (Score 1) 315

by mercnet (#37805122) Attached to: Ask Slashdot: What To Tell High-Schoolers About Computer Science?
I found this tutorial great for showing how linear algebra relates to gaming: I wish my linear algebra teacher taught this way, we never got any real life examples, just straight plug and chug linear problems. I went to Virginia Tech, freshmen math classes are a big disappointment there.

Make it right before you make it faster.