The IMGC-CNR, now INRIM, started in 1988 the development of analytical methods associated with FORTRAN software with the iterative aim of calculating the pressure distribution in piston-cylinder clearances and the main metrological Characteristics of piston-cylinder units. In 1996 the cooperation between the IMGC-CNR and the University of Cassino started due to the latter vast experience in handling finite element methods (FEM). Having been engaged in these studies for more than 10 years, we decided to write down our experiences, in order to be able to contribute to the scientific debate on the problems of the uncertainty of modern pressure balances. We decided to write this book in a open way, making it accessible to all our colleagues on internet and publishing it for free distribution, as we are primarily interested to gain experience all together. The following main topics are reported in the chapters of the book: generalities on the pressure scale, description of pressure balances for pressure measurements in liquids up to 3 GPa, derivation of the measurement uncertainty for pressure balances; theoretical methods used to derive the effective area Ae and the pressure distortion coefficient with the presentation of the iterative numerical methods used; some important aspects of the finite element methods (FEM), details of experiences gained within the EUROMET Project #463, a follow up of the EUROMET Project #740 for the calculation of A0, the collaborations with different international institutes and companies.
Ten years of experience in modelling pressure balances in liquid media up to few GPa
BUONANNO, Giorgio;FICCO, Giorgio;GIOVINCO, Gaspare;
2007-01-01
Abstract
The IMGC-CNR, now INRIM, started in 1988 the development of analytical methods associated with FORTRAN software with the iterative aim of calculating the pressure distribution in piston-cylinder clearances and the main metrological Characteristics of piston-cylinder units. In 1996 the cooperation between the IMGC-CNR and the University of Cassino started due to the latter vast experience in handling finite element methods (FEM). Having been engaged in these studies for more than 10 years, we decided to write down our experiences, in order to be able to contribute to the scientific debate on the problems of the uncertainty of modern pressure balances. We decided to write this book in a open way, making it accessible to all our colleagues on internet and publishing it for free distribution, as we are primarily interested to gain experience all together. The following main topics are reported in the chapters of the book: generalities on the pressure scale, description of pressure balances for pressure measurements in liquids up to 3 GPa, derivation of the measurement uncertainty for pressure balances; theoretical methods used to derive the effective area Ae and the pressure distortion coefficient with the presentation of the iterative numerical methods used; some important aspects of the finite element methods (FEM), details of experiences gained within the EUROMET Project #463, a follow up of the EUROMET Project #740 for the calculation of A0, the collaborations with different international institutes and companies.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
