Metrology

Flow metrology & rheology

News and Updates

Alpha-Gamma Device Step 1

Neutrons by the Numbers

May 21, 2018
After years of research, scientists at the National Institute of Standards and Technology (NIST) have developed and...
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Publications

Flow fluctuations in wormlike micelle fluids

October 22, 2018
Author(s):
Paul NMN Salipante, Steven Meek, Steven D Hudson
We investigate the unstable flow of wormlike micelle solutions in pressure driven capillary flow, with a focus on the effect of entrance geometry on the fluid...

Improving Measurement for Smokestack Emissions - Workshop Summary

September 21, 2018
Author(s):
Rodney A. Bryant, Aaron N. Johnson, John D. Wright, Tamae M. Wong, James R. Whetstone, Michael R. Moldover, Iosif I. Shinder, Scott Swiggard, Chris Gunning, David Elam, Tom Martz, Eric Harman, David Nuckols, Liang Zhang, Woong Kang, Salvator Vigil
The complex flow conditions inherent in power plant smokestacks make accurate flow measurements challenging, which in turn limits the accuracy of hazardous...
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Projects & Programs

Material Qualification

The lack of repeatable process outcomes from additive manufacturing (AM) has been broadly acknowledged as an impediment to widespread implementation. While...

AM Machine and Process Qualification

Machines and processes used to produce critical components for defense, aerospace, and medical applications must first be formally qualified. While...

COMPLETED: Polymer Formulations

Our goal is to develop combinatorial and high-throughput measurement approaches for rapid characterization of the structure and phase behavior of...
Diagram of NIST's Smoke Stack Simulator test bed

Smoke Stack Simulator

Today, inconsistencies between measured CO2 emissions and emissions calculated from coal consumption are on the order of 10% to 20%. The objective of this...
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Tools & Instruments

15 L/s Dynamic Flow Standard

Liquid Flow Standards

The Fluid Metrology Group has four liquid flow standards spanning the flow range 0.002 L/s to 65 L/s with uncertainties less than 0.06 % at a 95 % confidence...
Apparatus for calibrating hydrometers and measuring the density of liquids

Liquid Density

The Fluid Metrology Group developed a dual-purpose, automated apparatus to calibrate hydrometers via Cuckow’s method and to also measure the density of...
wind tunnel instrument

Wind Tunnel

NIST’s wind tunnel can produce air speeds between 0.15 m/s and 40 m/s. The air speed reference is a Laser Doppler Anemometer (LDA) with an uncertainty of 2.5...
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