{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

13+flow+in+pipes+and+pipe+networks (1)

13+flow+in+pipes+and+pipe+networks (1) - CHBE 3200...

This preview shows pages 1–6. Sign up to view the full content.

CHBE 3200 Transport I Dr. Lu 1 Flow in pipes: We derived before that pressure gradient Î We are interested in pressure difference in practice (e.g. sizing pumps) Dimensional analysis on the new problem: - keep as the core group - - From Bernoulli’s we know are equivalent Î pressure drop can be replaced by head loss : (Head loss defined as equivalent “head” of liquid to generate the same pressure difference ) Î Î Î Î

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
CHBE 3200 Transport I Dr. Lu 2 Now we need to find f f . Laminar flow in pipe (Re<2,300) Turbulent flow in tubes Î difficult to calculate. Î Two options: Smooth tubes: Rough tubes: Intermediate Re:
CHBE 3200 Transport I Dr. Lu 3 Example: - water (59F) flows through 6” ID cast-iron pipe - v avg = 4 ft/s - L = 120 ft - What is h L ? Step 1. Find e/D Step 2. calculate Re. Step 3. Find f f Step 4. h L =

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
CHBE 3200 Transport I Dr. Lu 4 Figure 13.3. The Fanning Friction Factor as a function of Re and D/e
CHBE 3200 Transport I Dr. Lu 5 Figure 13.2. Moody plot. Roughness parameters for pipes and tubes. Values of e and given in feet.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 10

13+flow+in+pipes+and+pipe+networks (1) - CHBE 3200...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online