Flow metrology & rheology

News and Updates

NIST Goes With the (Slow) Flow: New Technique Could Improve Biotech, Precision Medicine

September 26, 2019

Researchers at the National Institute of Standards and Technology (NIST) have developed an optical system that

NIST Presents First Real-World Test of New Smokestack Emissions Sensor Designs

June 26, 2019

In collaboration with industry, researchers at the National Institute of Standards and Technology (NIST) have completed

Assessing the Next-Generation Backing Materials for Body Armor Testing

March 28, 2019

A framework of rheological techniques was developed to evaluate a candidate ballistic witness material developed by the

Helping the Microchip Industry Go (Very Low) with the Flow

August 22, 2018

A new study by scientists at the National Institute of Standards and Technology (NIST) has uncovered a source of

Projects and Programs

Atomic Standard for Pressure

NIST scientists are developing a highly accurate primary standard for pressure in the range 2 MPa to 7 MPa based on fundamental physical properties of helium

Acoustic Techniques in Fluid Metrology

The Fluid Metrology Group leads the world in designing and using gas-filled acoustic resonators for measuring the thermodynamic temperature T, the Boltzmann

The NIST Chemistry Webbook

The NIST Chemistry WebBook is a site on the Internet (http://webbook.nist.gov/) that provides convenient access to a variety of physical and chemical property

Material Qualification

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

Publications

The Role of Spherulitic Superstructures on the Rheology of Crystallizing Polymers

November 1, 2019

Author(s)

Debjani Roy, Debra J. Audus, Kalman D. Migler

A longstanding goal in polymer rheology is to develop a physical picture that relates the growth of mechanical moduli during polymer crystallization to that of

Dynamic Measurement of Nanoflows: Realization of an Optofluidic Flow Meter to the Nanoliter-per- Minute Scale

August 8, 2019

Author(s)

Gregory A. Cooksey, Paul N. Patrone, James R. Hands, Stephen E. Meek, Anthony J. Kearsley

The ultimate performance of flow-based measurements in microfluidic systems is limited by their accuracy at the nanoliter-per-minute scale. But improving such

Progress Towards a Gas-Flow Standard using Microwave and Acoustic Resonances

July 16, 2019

Author(s)

Jodie G. Pope, Keith A. Gillis, Michael R. Moldover, Eric Harman, James Mehl

We describe our progress in the development of a novel gas flow standard using the acoustic and microwave resonances of a 1.85 m3, nearly-spherical, steel

Non Nulling Measurements of Flue Gas Flows in a Coal-Fired Power Plant Stack

June 28, 2019

Author(s)

Aaron N. Johnson, Iosif I. Shinder, Bernard J. Filla, Joey T. Boyd, Rodney A. Bryant, Michael R. Moldover

Exhaust flows from coal-fired stacks are determined by measuring the flue gas velocity at prescribed points in the stack cross section. During the last 30+