×
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

Gap Study

Gap Study

Gap Study

(OP)
My boss came to me this morning and asked me to do a gap study on our new design concept. I have never done one and do not know where to look to even begin. Also he wants me to conduct a flow analysis across the cross sectional area of the gap. Help... Thanks in advance.

RE: Gap Study

I am just in the "blind" as you are because you have not described the problem that involves whatever system. Describe in fuller details what you are working on.

RE: Gap Study

(OP)
Now we are both blind. He just came back in to explain further. He wanted to me to calculate the percentage of flow through 2 different cross sectional areas. Just wanting to know what percentage of fluid is being diverted from the main flow hole. At my last job they showed me one time how to do a gap study in the design process but I have yet to understand where they get the criteria to even begin a study. Is there another name for a gap study I am not familiar with?

RE: Gap Study

So, we seem to be looking at a hydraulic problem that involves what? pipe drainage, hydraulic fluid piping, pneumatic system....?

RE: Gap Study

(OP)
This deals with mud flow through flow holes. Wanting to calculate the drop in pressure due to the 2 different flow holes. One being a direct flow hole and the other being the cross sectional area between 2 parts.

RE: Gap Study

I'd say it is a bit more complicated than comparing the ratio of the areas, which is almost always the "first cut" that Folks use. (In some groups in some companies in some industries it seems Sometimes it's the final cut, too).
As you describe the system as having "gaps" I guess the resistance, etc factors produced for sudden expansions and contractions by common pipe flow calculators won't be much help.

RE: Gap Study

(OP)
The boss was needing this calculation to let the drilling rig know a percentage of fluid loss across the gap versus the flow hole. I am an entry level engineer trying to make it....I have a lot left to learn and on to the bachelor's degree next semester.

RE: Gap Study

Got your fluid mechanics textbook handy?

Regards,

Mike

RE: Gap Study

(OP)
I have it. Understanding it is completely different.

RE: Gap Study

Ask a co-worker for a "go-by" calculation?

RE: Gap Study

The first step would be to establish the orifice flow coefficients for your two cases. You need to consider factors like length/flow area of the restriction, geometry of the inlet/outlet, relative pressures and flow velocities across the restriction, etc.

You will also need the properties for the fluid being considered. I can imagine that your drilling mud might have some unusual fluid characteristics. Particulate solids suspended in a fluid.

RE: Gap Study

can you get hold of a previous anlaysis your company did ?

Quando Omni Flunkus Moritati

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!


Resources