G Klingenberg 1987 Metrologia 24 89 doi:10.1088/0026-1394/24/2/005
G Klingenberg
Show affiliationsCalculation of the pressure dependence of the effective area of pressure balances normally assumes the pressure gradient in the clearance between the piston and cylinder to be constant along the engagement length of the piston which yields a linearly varying clearance between the piston and cylinder. The assumption is not strictly valid.
In this work, the assumption is avoided by applying the theory of flow in a converging channel to the pressure balance to calculate: (i) The upward force on the flanks of the piston due to fluid friction; (ii) The flow passing through the clearance and (iii) The pressure coefficient for a pressure balance.
47.11.-j Computational methods in fluid dynamics
47.60.-i Flow phenomena in quasi-one-dimensional systems
06.30.-k Measurements common to several branches of physics and astronomy
Issue 2 (1987)
Received 11 October 1986
G Klingenberg 1987 Metrologia 24 89
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