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DAVID W. SPITZER'S E-ZINE
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TECHNICAL AND MARKETING SERVICES FOR INSTRUMENTATION SUPPLIERS AND END-USERS
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Recently, it occurred to me that there are a whole lot of people who do not understand the Reynolds number, what it means and how to use it.
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Last month I described a sewage system where there sewage was measured by flowmeters at each of the four outfalls from the upper district, along with a total plant flowmeter at the inlet of the sewage treatment plant in the lower district. Flow from the upper district (my client) was calculated by summing the flow measurements from the four outfalls. Flow from the lower district was calculated by subtracting the upper district flow from the total plant flowmeter. Flowmeter accuracy was questioned because the flow from the upper district was relatively high (per capita) as compared to the lower district. I was asked to investigate the flowmeters.
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In general, liquids tend to get "thinner" when their temperature increases. For example, honey and oil tend to flow better at higher temperatures. Therefore, increasing temperature decreases viscosity.
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ABOUT SPITZER AND BOYES, LLC
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In addition to over 35 years of experience as an instrument user, consultant, and expert witness, David W Spitzer has written over 10 books and 250 articles about flow measurement, level measurement, instrumentation, and process control. David (with Walt Boyes) is the author of seven Consumer Guides to various industrial flow and level technologies. David teaches his flow measurement seminars in both English and Portuguese.
Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting, distribution consulting, and expert witness services worldwide, and can be contacted at +1.845.623.1830 or www.spitzerandboyes.com.
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ISSN 1538-5280 ©2013 Spitzer and Boyes, LLC
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