# For each case, calculate an appropriate Reynolds number and indicate whether the flow can be approximated by the creeping flow

## Question:

For each case, calculate an appropriate Reynolds number and indicate whether the flow can be approximated by the creeping flow equations.

(a) A microorganism of diameter 5.0 μm swims in room temperature water at a speed of 0.25 mm/s.

(b) Engine oil at 140°C flows in the small gap of a lubricated automobile bearing. The gap is 0.0012 mm thick, and the characteristic velocity is 15 m/s.

(c) A fog droplet of diameter 10 μm falls through 30°C air at a speed of 2.5 mm/s.

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## Step by Step Answer:

**Related Book For**

## Fluid Mechanics Fundamentals And Applications

**ISBN:** 9780073380322

3rd Edition

**Authors:** Yunus Cengel, John Cimbala

**Question Details**

Chapter #

**10**- APPROXIMATE SOLUTIONS OF THE NAVIER–STOKES EQUATIONSection: Problems

Problem: 36

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