An aerosol particle of characteristic size D p moves in an airflow of characteristic length L and
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An aerosol particle of characteristic size Dp moves in an airflow of characteristic length L and characteristic velocity V. The characteristic time required for the particle to adjust to a sudden change in air speed is called the particle relaxation time τp, Verify that the primary dimensions of τp are time. Then create a dimensionless form of τp, based on some characteristic velocity V and some characteristic length L of the airflow (Fig. P7–103). What established dimensionless parameter do you create?
FIGURE P7–103
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Fluid Mechanics Fundamentals And Applications
ISBN: 9780073380322
3rd Edition
Authors: Yunus Cengel, John Cimbala
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