×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

# corrosion & water flow patterns

## corrosion & water flow patterns

(OP)
I am trying to find something related to corrosion on boats on seawater, especifically I wonder if there is a way to stablish a relationship between the water-flow pattern below the boat and the configuration of anodes to prevent corrosion...I can get flow patterns by a STAR-CD analysis, I just want to know the relationship.

### RE: corrosion & water flow patterns

Hi
If we are talking about the corrosion which is due to friction between water boundary layer and boat body, then you have to find the water boundary lyer velocity profile over the boat body, then apply Newton low of viscosity (T= M x dv\dn )Where :
T:Shear stress
M: water viscosity
dv\dn :velocity derivative to boundary layer thickness.
Then you can integerate the sher stress over the area to find whats called drag force (skin friction) which caused the corrosion.

You can go to a less accuracy formula which leads to :
Drag force = Cf x 1/2 x water density x A x V^2 where :
Cf : 1.328 / ( Re )^0.5 ( palte coefficient of skin drag)
Re : Plate Reynolds number.
A: Plate area.
V: velocity just out side the boundary layer.

I hope the above is helpful

BYYY

#### 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.

#### Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!