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Vanity: Need to Calculate Drag on Sq Plate in 6 mph current
Email | 05-04-2006 | R J Cook

Posted on 05/04/2006 7:17:20 PM PDT by Robert A Cook PE

My dad (long time civil structural engineer) sent the following question this evening to me:

Tomorrow morning, I need the drag of one square foot of plate in 6 mph water. Not edge effects, downstream turbulence, corner losses, etc. Just how much force will I have to provide to hold a square foot of plate still into a 6 mph current? No, not in channel. In open water.

I can't find it ANYWHERE! Durn! Got a structure in a pickle in water, and I really need that drag force to figure piling forces. My Olde Books are EMPTY on the subject.

Anybody got a suggestion of how much it will take? Please?

Ramon in a mess, Durn!


TOPICS: Astronomy; Chit/Chat; Education; Miscellaneous
KEYWORDS: drag; flow; resistance; water
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To: grey_whiskers

e may be on to something expontial.


41 posted on 05/05/2006 10:08:29 AM PDT by Robert A Cook PE (I can only donate monthly, but Hillary's ABBCNNBCBS continue to lie every day!)
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To: 359Henrie
I know you need 6lb drag setting to bring in a 7lb rainbow.

....and my finale'

What did you get when you reeled in the 7 lb rainbow ?

.

.

.....a 120# homosexual

Try the veal - and enjoy your stay in the Catskills

42 posted on 05/05/2006 3:24:46 PM PDT by Revelation 911 (God is love, Love endures forever, Love God, Love your neighbor,)
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To: RAY; Robert A. Cook, PE

I agree with RAY's answer.

I used the simple expedient of imagining a square plate or board being pushed by hand at a walking pace through water.

I figured about 75 pounds for a one foot square object, so 174 pounds of force for the size described sounds intuitively correct.


43 posted on 05/05/2006 4:11:22 PM PDT by NicknamedBob (I grew up so long ago that being grown-up was more fun than being a kid!)
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