{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# ecm 6 soln - ECM 5 Winter 2009 Solution Set 6 Given the...

This preview shows pages 1–2. Sign up to view the full content.

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.

Unformatted text preview: ECM 5 Winter, 2009 Solution Set 6 Given the definition of the Reynolds number: (1) μ ρ vd N = Re 1. a) For the SI system of units, determine the units of each of the variables in the Reynolds number. Solution : The SI units for length (L), time (T), and mass (M) are meters (m), seconds (s), and kilograms (kg), respectively. Thus, looking at the base units for each variable in the Reynolds number, we substitute their SI units. 3 3 m kg L M density = = = ρ characteristic velocity s m T L v = = = characteristic length m L d = = = s m kg T ML ity vis ⋅ = = = μ cos 1. b) What are the units of N Re ? Solution : We determine the units of NRe from dimensional analysis. That is, we substitute variables in the equation with their units (making sure that all units are of the same system and magnitude) and examine for cancellations and simplifications. [ ] [ ] 1 3 2 3 Re =       ⋅       ⋅ =       ⋅       ⋅ ⋅ = ...
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

ecm 6 soln - ECM 5 Winter 2009 Solution Set 6 Given the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online