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!
  • Students Click Here

*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

Colebrook White v.s. Manning Equation for Pipe Flow

Colebrook White v.s. Manning Equation for Pipe Flow

Colebrook White v.s. Manning Equation for Pipe Flow


I know that both Colebrook White Equation and Manning Equation are commonly used for the design of gravity pipe flow.

However, it is more common in my country for people to use:
1. Colebrook White Eqaution for gravity pipe flow
2. Manning Equation for open channel flow

Does anyone know the reason behind? Is it just a matter of common practice?

RE: Colebrook White v.s. Manning Equation for Pipe Flow

Does anyone know please? : [

RE: Colebrook White v.s. Manning Equation for Pipe Flow

its not common practice

RE: Colebrook White v.s. Manning Equation for Pipe Flow

I've never used Colebrook-White for gravity pipe or open channel, only Manning.

RE: Colebrook White v.s. Manning Equation for Pipe Flow

So no one would use Colebrook White Equation for gravity pipe design?

RE: Colebrook White v.s. Manning Equation for Pipe Flow

I use Mannings for water flowing outdoors in open channels, water/sewage flowing in non-pressure pipelines (gravity flow in pipes is just another type of open channel flow), and water flowing under pressure in large diameter irrigation and storm drainage piping. I use Hazen-Williams for water flowing under pressure in transmission mains and distribution systems. I use Colebrook-White mostly for natural gas and I used to use it sometimes for pumping station piping. However, all three of the formulas I cite can be adapted for any of the water flow situations I mentioned.

"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

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


eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
Research Report - Simulation-Driven Design for SOLIDWORKS Users
In this engineering.com research report, we discuss the rising role of simulation and the paradigm shift commonly called the democratization of simulation. In particular, we focus on how SOLIDWORKS users can take advantage of simulation-driven design through two analysis tools: SOLIDWORKS Simulation and 3DEXPERIENCE WORKS. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. 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