×
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!
  • 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

Jobs

Suggestions for Modeling a Buried Pipe,

Suggestions for Modeling a Buried Pipe,

Suggestions for Modeling a Buried Pipe,

(OP)
Hi,

 I have to model a NPS 48" buried pipe at 1 meter depth in soil(semi-infinite solid)K=1.7 W/ms).I need this geometry model in order to perform a steady state heat transfer analysis.The fluid inside the pipe is stationary and its temperature is 40C.

Is there anyone who could give me some suggestions of how to proceed with this modeling?

Best Regards,

 One Point

RE: Suggestions for Modeling a Buried Pipe,

I would build the pipe, apply the internal fluid pressure as a constant (or vary the internal surfaces and apply piecewise linear pressures), apply the temperature gradient, and then put an external hydrostatic pressure on the top of the pipe giving the fluid density causing the hydrostatic pressure a density equivalent to soil.

Another option is to model the internal pressure as a hydrostatic pressure and then apply a uniform pressure on top of the pipe.

One final option off the top of my head is to build the pipe.  On top of the pipe, build brick elements up to the surface.  Give the brick elements a low modulus or even use 3D kinematic elements so it doesn't try to calculate the stress in them, but give them a density of soil.  If this makes too many elements, cut it short and manipulate the density based on the weight of soil that you need and the volume of brick elements you build.

Garland

Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group

RE: Suggestions for Modeling a Buried Pipe,

(OP)
Dear Mr.Borowski,

Thank you for your suggestions offered to me . I was very impressed with your web site. It seems to me that your level of expertise is quite advanced.

I am more of a beginer with ALGOR.I had only some experience with Pro/Mechanica and Pro/Engineer. Unfortunately in my office I do not have these softwares available.The only FEA software available in my office is ALGOR.

I am not sure if , by following the details that you have sent to me, I could manage to create a correct model of a buried pipe. Is there any tutorial or worked example for a buried pipe model that you know of? Looking forward to hearing from you.

Regards,

One Point

RE: Suggestions for Modeling a Buried Pipe,

Thank you for the compliments...I will pass them on to my website builder/business manager.

I may have misunderstood...is this purely for a heat transfer model?  If so, many of the suggestions that I made regarding the pressures is probably not important.  Are you just trying to give an internal temperature and determine the conduction through the pipe and convection into the soil?  If so, this problem becomes a much easier 2-D model that starts with modeling the cross-section of the pipe.

Let me know.

Garland

Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group

RE: Suggestions for Modeling a Buried Pipe,

(OP)
Dear Mr. Borowski,

Thank you very much for your support. As I have mentioned before, I am not quite knowlegeable with ALGOR capabilities.

Comparing ALGOR with Pro/Engineer I would say that now as I started working with ALGOR, I do like ALGOR much more then PRO/Engineer.

Yes, I am just trying to give an internal temperature and determine the conduction through the pipe and convection/conduction into the soil.

So, is it possible for you to walk me through the necessary steps to model the buried pipe geometry? I have to perform a steady state heat transfer analysis for this buried  and uninsulated pipe at a depth of 1 meter.

Could you please tell me how are going to help me? I look forward to hearing from you.

Once again thanks a lot.

One Point

Best regards,

bogdan_enviro@yahoo.co.uk

  

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

White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. 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