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Topic Area: Chemical Engineering
Processing

Displaying records 31 to 40 of 105 records.
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31. Reference Viscosities of H^d2^, CH^d4^, Ar and Xe at Low Densities
Topic: Chemical Engineering & Processing
Published: 8/1/2007
Authors: E May, Robert F Berg, Michael R Moldover
Abstract: We determined the zero-density viscosity eta of hydrogen, methane and argon in the temperature range 200 K to 400 K, with standard uncertainties of 0.084 % for hydrogen and argon and 0.096 % for methane. These uncertainties are dominated by the unce ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830996

32. The Polarizability of Helium and Gas Metrology
Topic: Chemical Engineering & Processing
Published: 6/22/2007
Authors: James W Schmidt, R Gavioso, E May, Michael R Moldover
Abstract: Using a quasi-spherical, microwave cavity resonator, we measured the refractive index of helium to deduce its molar polarizability {I}A{/I}^d{epsilon}^ in the limit of zero density. We obtained ({I}A{/I}^d{epsilon},meas^ - {I}A{/I}^d{epsilon},theory^ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830993

33. NIST Calibration Services for Water Flowmeters Water Flow Calibration Facility
Series: Special Publication (NIST SP)
Report Number: 250-73
Topic: Chemical Engineering & Processing
Published: 8/1/2006
Authors: Iosif I Shinder, Iryna V. Marfenko
Abstract: This document describes the Water Flow Calibration Facility (WFCF) at the National Institute of Standards and Technology (NIST). This facility has three parallel pipelines with diameters of 100, 200 and 400 mm and three weighing systems with capaciti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830979

34. A Reference Standard for Measuring Humidity of Air Using a Re-entrant Radio Frequency Resonator
Topic: Chemical Engineering & Processing
Published: 5/2/2006
Authors: Peter H Huang, Dean C Ripple, Michael R Moldover, Gregory E Scace
Abstract: We developed a stable reference hygrometer suitable for operation at temperatures above ambient that has a robust design, inherent stability, and a well-understood theory of measurement. This hygrometer uses a reentrant, radio-frequency, cavity reson ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902995

35. Relaxation Effects in Small Critical Nozzles
Topic: Chemical Engineering & Processing
Published: 1/1/2006
Authors: Aaron N Johnson, C L Merkle, Michael R Moldover, John D Wright
Abstract: We computed the flow of four gases (He, N^d2^, CO^d2^, and SF^d^6) through a critical nozzle by augmenting traditional computational fluid dynamics (CFD) with a rate equation that accounts for {tau}^drelax^, a species-dependent relaxation time that c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830846

36. Gas Flowmeter Calibrations with the 34 L and 677 L PVTt Standards
Series: Special Publication (NIST SP)
Topic: Chemical Engineering & Processing
Published: 6/23/2004
Authors: John D Wright, Aaron N Johnson, Michael R Moldover, Gina M Kline
Abstract: This document provides a description of the 34 L and 677 L pressure, volume, temperature, and time (PVTt) primary gas flow standards operated by the National Institute of Standards and Technology (NIST) Fluid Flow Group. These facilities are used to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830866

37. Temperature Metrology and Its Impact on Industry
Topic: Chemical Engineering & Processing
Published: 9/1/2003
Authors: Hratch G. Semerjian, Ellyn S. Beary
Abstract: Temperature measurement represents one of the most frequently and broadly used measurements, with a majority of products manufactured having temperature measurement devices as an esential component. The accuracy and precision of these temperature me ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830018

38. Flow Tele-Metrology
Topic: Chemical Engineering & Processing
Published: 12/1/1999
Author: Pedro I Espina
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100622

39. Isochoric Heat Capacity of Heavy Water at Sub- and Supercritical Conditions
Topic: Chemical Engineering & Processing
Published: 12/1/1999
Authors: B A Mursalov, I M Abdulagatov, V I Dvoyanchikov, A N Kamalov, S B Kiselev
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100737

40. Radioluminescence Detector for the Flow Injection Determination of Phosphorous as Vanadomolybdophoric Acid
Topic: Chemical Engineering & Processing
Published: 12/1/1999
Authors: A M Leach, D L Burden, G M Hieftje
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100590



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