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Author: robert berg

Displaying records 31 to 40 of 49 records.
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31. 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

32. Measurement of Microkelvin Temperature Differences in a Critical-Point Thermostat
Published: 3/1/1998
Authors: Robert F Berg, G A Zimmerli, Michael R Moldover
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901920

33. 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

34. Temperature-Induced Density Gradients in Liquid-Vapor Critical Point Experiments
Published: 5/6/1997
Author: Robert F Berg
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100403

35. Internal waves in xenon near the critical point
Published: 6/1/1996
Authors: Robert F Berg, Margaret J. Lyell, Geoffrey B McFadden, Ronald G. Rehm
Abstract: Just above the liquid-vapor critical point, a fluid‰s large compressibility causes a stable stratification in which the density varies by as much as 10% in 1 cm. This stratification supports internal gravity waves which we observed with an oscillator ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915337

36. Hydrodynamic similarity in an oscillating body viscometer
Published: 9/1/1995
Author: Robert F Berg
Abstract: Hydrodynamic similarity can be used to calibrate simply and accurately an oscillating-body viscometer of arbitrarily complicated geometry. Usually, an explicit hydrodynamic model based on a simple geometry is required to deduce viscosity from the tra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915335

37. Temperature and frequency dependence of anelasticity in a nickel oscillator
Published: 9/1/1995
Author: Robert F Berg
Abstract: The frequency dependence of the real and imaginary parts of a nickel oscillator‰s transfer function is described over 3 decades in frequency by the use of simple expressions. These expressions incorporate only the resonance frequency omega0, the qual ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915336

38. Remarkably small critical exponent for the viscosity of a polymer solution
Published: 7/15/1994
Authors: Robert F Berg, Karen Gruner
Abstract: We have measured the apparent critical exponent y characterizing the divergence of the viscosity eta  (T- Tc)^-y near the liquid-liquid critical point of the mixture polystyrene in diethyl malonate. The data span the range in reduced temperat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915334

39. Thermal equilibration near the critical point: Effects due to three dimensions and gravity
Published: 9/1/1993
Author: Robert F Berg
Abstract: Two calculations are presented that clarify how the density profile equilibrates near the liquid-vapor critical point. Both use the equation of heat transfer recently improved to account for the large compressibility near the critical point. Previous ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915333

40. Flow of microemulsions through microscopic pores
Published: 11/15/1992
Authors: Dean C Ripple, Robert F Berg
Abstract: The flow of the microemulsion dioctylsulfosuccinate (AOT)/decane/water through 0.1 and 1.0 um diameter pores was studied for water droplet volume fractions ranging from 0 to 0.5. The viscosity of these microemulsions, as measured in a capillary visco ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915288



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