×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Boundary Layer Control - Skin Friction

Boundary Layer Control - Skin Friction

Boundary Layer Control - Skin Friction

(OP)
I'm investigating possible drag reductions for ship hulls and submarines.  Is there any data available for skin texture (roughness, etc) effects at various speeds and/or Reynolds numbers, etc?

I've heard that sharks have a matt finish which reduces their total drag quite a bit.  Anyone know about this subject?

RE: Boundary Layer Control - Skin Friction

Somewhat off topic; there recently, i.e., sometime this year, Scientic American had a fascinating article about using supercavitation as a means of reducing drag for torpedoes.  I've also been told that certain anti-mine ammuntion likewise uses supercavitation to get increased penetration depth.

TTFN

RE: Boundary Layer Control - Skin Friction

I note that this thread is fairly old, but this information may still be usefull.  There is an ultra thin coating that can be applied over hull paint that will greatly reduce drag.  It is self bonding and non-stick in nature.  It can be found at www.kiss-cote.com.  ;

Good luck,

Malcolm

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close