Need help understanding drag forces in external flow past immersed bodies (Flat plates, airfoils, ec...

This post has been de-listed

It is no longer included in search results and normal feeds (front page, hot posts, subreddit posts, etc). It remains visible only via the author's post history.

Need help understanding drag forces in external flow past immersed bodies (Flat plates, airfoils, ect)

Post Body

Hey everyone. I'm having trouble understanding where and what area is affected by drag when flow is moving past a immersed body, like a flat plate for example.

In my textbook : Fluid Mechanics by Frank M. White, the Coefficient of Drag, is: C_d = (2Drag)/(DensityVelocity_squared*Area).

From my understanding the Area portion of the formula is either the frontal area, or the planform area (area from the top view). A few the problems in the text use the length and height of the shape, not the length and width (into the page). Can anyone explain why?

This is the question I was referring to : http://www.sfu.ca/~ptaherib/teaching/ENSC_283_2013/Suggested Problems/Suggested Problems Chapter 7/P7.56.pdf

Thanks in advance!

Author

User Disabled User Suspended

Account Strength

Disabled 8 months ago

Suspended 9 months ago

Account Age

12 years

Verified Email

Yes

Verified Flair

Total Karma

Link Karma

5,091

Comment Karma

27,325

Profile updated: 2 hours ago

Posts updated: 10 months ago

Starky_D

Subreddit

r/EngineeringStudents

Post Details

We try to extract some basic information from the post title. This is not always successful or accurate, please use your best judgement and compare these values to the post title and body for confirmation.

Posted: 10 years ago
Reddit URL: View post on reddit.com
External URL: reddit.com/r/Engineering...