DB325: Lesson 7 - Principles of Fluid Mechanics 3 SAQ: Suggested Response - Q1

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This lesson allows you to test yourself on the material covered in the lesson on Principles of Fluid Mechanics 3, and to determine the level to which you have met the learning outcomes.

Suggested Response - Q1

* Determine the relative roughness of a pipe with an internal diameter of 15 mm and an absolute roughness of 0.05 mm.

Response:

We know that the relative roughness is the ratio of absolute roughness to the pipe’s inside diameter:

$R e l a t i v e space R o u g h n e s s space ϵ equals fraction numerator A b s o l u t e space R o u g h n e s s space e over denominator P i p e apostrophe s space I n s i d e space D i a m e t e r space d end fraction$

$R e l a t i v e space R o u g h n e s s space ϵ equals fraction numerator 0.05 over denominator 15 end fraction equals 0.0033$

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Lesson 7 - Principles of Fluid Mechanics 3 SAQ

Suggested Response - Q1

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