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1. Accurate Measurements of Process Gas Flow with Laminar Flow Meters
Published: 10/15/2010
Authors: Thiago Cobu, Robert F Berg, John D Wright, Michael R Moldover
Abstract: We calibrated three models of commercially-manufactured, laminar flow meters (LFMs) with nitrogen at four pressures (100 kPa, 200 kPa, 300 kPa, and 400 kPa) over a 10:1 flow range using NIST‰s primary flow standards and a physical model. Without addi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906313

2. Calibration of Laminar Flow Meters for Process Gases
Published: 6/1/2012
Authors: John D Wright, Thiago Cobu, Robert F Berg, Michael R Moldover
Abstract: We calibrated three models of commercially-manufactured, laminar flow meters (LFMs) at four pressures (100 kPa, 200 kPa, 300 kPa, and 400 kPa) with five gases (N2, Ar, He, CO2, and SF6) over a 10:1 flow range using NIST‰s primary flow standards as re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908560

3. Critical Viscosity of Xenon: Surprises and Scientific Results
Published: 10/1/1998
Authors: Robert F Berg, Michael R Moldover, G A Zimmerli
Abstract: The Critical Viscosity of Xenon (CVX) experiment, which flew on board Space Shuttle flight STS-85 in August 1997, measured the viscosity of xenon near the liquid-vapor critical point. Very close to the critical temperature (T^dc^ = 290 K), the visco ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831511

4. Critical Viscosity of the Ionic Mixture Triethyl n-Hexyl Ammonium Triethyl n-Hexyl borate in Diphenyl Ether
Published: 9/15/1998
Authors: S. Wiegand, Robert F Berg, Johanna M.H. Levelt-Sengers
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902025

5. Critical exponent for the viscosity of carbon dioxide and xenon
Published: 8/1/1990
Authors: Robert F Berg, Michael R Moldover
Abstract: The viscosities eta of carbon dioxide and xenon have been measured near their critical points and the critical exponent y characterizing the asymptotic divergence, eta ~ |T- Tc|^-y, has been determined. Both fluids yielded exponents in the rangey = 0 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915285

6. Critical exponent for the viscosity of four binary liquids
Published: 9/15/1988
Authors: Robert F Berg, Michael R Moldover
Abstract: We have measured the viscosity of four binary mixtures near their consolute points: (1) methanol + cyclohexane, (2) isobutyric acid + water, (3) nitroethane + 3-methylpentane, and (4) 2-butoxyethanol + water. The viscosity data are consistent with th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915284

7. Critical exponent for viscosity
Published: 12/15/1990
Authors: Robert F Berg, Michael R Moldover
Abstract: We have measured the critical exponent y characterizing the divergence of the viscosity eta  |T ‹ Tc|^-y for carbon dioxide and xenon. The values of y for both fluids fall within the range y = 0.041 ± 0.001 and are consistent with the range y ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915286

8. Development of a Combinatorial Rheometer for Polymer Formulations
Published: 2/1/2004
Authors: H J Walls, Robert F Berg, Kathryn L Beers, Eric J. Amis
Abstract: Finding the best formulation for a new application, or fine-tuning an existing formulation to meet various customer needs, requires extensive sample preparation and testing. Our goal is to make this exploration more efficient for the property of visc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852353

9. Development of a Microfluidic Rheometer for Complex Fluids
Published: 1/1/2005
Authors: Jai A Pathak, Robert F Berg, Kathryn L Beers
Abstract: Our group has recently published a report of a combinatorial rheometer/viscometer developed in our lab, based on the princinple of a damped harmonic oscillator. In this paper, we describe a modification of this approach to scale down this viscometer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852499

10. Equilibration Near the Liquid-Vapor Critical Point in Microgravity
Published: 1/1/1998
Authors: R A Wilkinson, G A Zimmerli, H Hao, Michael R Moldover, Robert F Berg, W L Johnson, R A Ferrell, R W Gammon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902031



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