Artigos técnicos relacionados [EN]
-
29.03.22
An alternative magnetic measurement system for nanotechnology applications- Abstract:
A magnetic setup able to characterize microwires, particles and ferrofluid has been developed. It consists in a combination of two toroidal magnets, which move along their symmetric axis, and an analytical balance that supports a still sample. Permeability, (...)
-
- 29.03.22
Calibration of anemometers using wind tunnel contraction - Abstract:
A Laser Doppler Anemometer was used to calibrate the pressure drop across a wind tunnel contraction resulting in a mean coefficient of discharge Cd=0,984 at the cost of a small increase in uncertainty. Using the pressure differential to calibrate larger meters (...)
-
- 23.03.22
Turbine flowmeter and viscosity effects of liquid hydrocarbons - Abstract:
The article presents the results of tests carried out in turbine meters to investigate the effects of different viscosities in the curves, and to explore mathematical ways to express the low flow rate part of the curves in order to use them as a functional p (...)
-
- 22.03.22
Uma contribuição para a diminuição da confusão no uso de termos e expressos na metrologia - Abstract:
Metrology has been developed over human being history through the definition of quantities, the invention of the measuring apparatus, the establishment of measurement systems and the construction of an international metrological vocabulary. Despite this phen (...)
-
- 22.03.22
Aspectos relacionados à utilização de medidores de vazão de óleo e gás sob condições diferentes de calibração - Abstract:
For achieving a reliable and valid measurement, the measuring instrument should be previously calibrated by means of a reference standard which accurately represents the quantity under measurement. In the case of flow meters for oil and gas, they are usually (...)
