×
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

overflow grate

overflow grate

overflow grate

(OP)
I am modelling a pond (pre-existing) and was wondering about the best way to model my outlet device.  Like many structures I see, this one has a concrete riser with a couple of small holes drilled in the sides and big hole on top which has been fitted with a grate, much like you would see on a catch basin.

Should I model the grate as one big orifice or rows and collumns of small holes?  How much difference will it make?  As I mentioned, I am more evaluating an existing system, so sometimes the information I get is somewhat limited.

Thank you!

RE: overflow grate

For general information on modeling a riser structure please see the example at www.hydrocad.net/pond1.htm

For the top of the riser, I suggest you compare the two scenarios to see how much they differ.  For most spillways (including the top of a riser), a fairly large change in the discharge coefficient will have a relatively minor effect on the peak elevation and disccharge.  But you should test this to be sure.

Useful tips:  You can disable an existing outlet without deleting it by setting the discharge multiplier to zero.  Or you can use Control-Drag to make a copy of the entire node for testing.

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

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
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