×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Autopipe Review

Autopipe Review

Autopipe Review

(OP)
I have been tasked with reviewing a subcon's autopipe results related to a subsea pipe line
I have never used autopipe
While reviewing the input files, I found some confusing inputs and cannot get a straight answer.
Hoping someone here can clarify
Each node in the input file seems to have a drag, lift and inertia coefficient assigned. This is expected since these properties are necessary for assessing pipe in flowing water.
However, there is another drag and inertia coefficient associated with the wave load. (see included excerpt)
In my experience these coefficient are properties of the structure's geometry for a given Reynold's number, not a properties of the wave itself.
So why is there a drag coefficient listed for wave and another on the nodes?
What does autopipe do with these? Are they multiplied together before applying to Morsion's equations or are they added together, is one ignored....where in the Autopipe documentation does it discuss the interaction between these two drag coefficients (one in wave and one on geometry)?

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


Resources

Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’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:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close