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Today, inconsistencies between measured CO2 emissions and emissions calculated from coal consumption are on the order of 10% to 20%. The objective of this
Flow meters that rely on measuring the pressure drop across a laminar flow element can be accurately calibrated using a benign surrogate gas (such as helium or
The flow of polymer composites via injection molding, spraying or spreading on surfaces is crucial to polymer composite manufacturing. For single-phase liquids,
The lack of repeatable process outcomes from additive manufacturing (AM) has been broadly acknowledged as an impediment to widespread implementation. While most
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
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
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
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+
The dynamic gravimetric standard is used to calibrate micro-flow meters and to conduct research on new flow sensors. This micro-flow standard measures mass
A compressor is used to pressurize up to twenty-five 40 L gas cylinders to 35 MPa. The cylinders can then be used as a source of rapidly changing gas flow by
NIST developed a cryogenic flow loop; it is the only internationally-recognized facility for calibrating flow meters operating with liquid nitrogen. (After
NIST uses pressure, volume, temperature, and time ( PVTt ) standards to calibrate gas flow meters. PVTt flow standards generate selected, steady gas flows