Convective forces in high precision mass measurements

被引：13

作者：

Mana, G

Palmisano, C

Perosino, A

Pettorruso, S

Peuto, A

Zosi, G

机构：

[1] CNR, Ist Metrol G Colonnetti, I-10135 Turin, Italy

[2] Univ Turin, Dipartimento Fis Gen A Avogadro, I-10125 Turin, Italy

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2002年 / 13卷 / 01期

关键词：

kilogram standard; solid density-standard mass; balance; metrology; standards and calibration; precision measurements;

D O I：

10.1088/0957-0233/13/1/302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper deals with a numerical simulation of the natural convection air flow and its influence on apparent mass in high precision mass measurements. Results are in reasonable agreement with the experimental values obtained on a 1 kg silicon sphere and a 1 kg mass standard. There is clear evidence that the three-dimensional finite element model studied, allowing inclusions of the boundary and initial conditions determined experimentally, captures the most important features of convection and estimates the relevant corrections.

引用

页码：13 / 20

页数：8

共 10 条

[1] NUMERICAL SOLUTION OF 3-DIMENSIONAL EQUATIONS OF MOTION FOR LAMINAR NATURAL CONVECTION [J].