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Viscosity correction factor for safety relief valves
Author(s) -
Darby Ron,
Molavi Kamyar
Publication year - 1997
Publication title -
process safety progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.378
H-Index - 40
eISSN - 1547-5913
pISSN - 1066-8527
DOI - 10.1002/prs.680160207
Subject(s) - dimensionless quantity , viscosity , safety valve , nozzle , computation , mechanics , relief valve , discharge coefficient , computational fluid dynamics , newtonian fluid , code (set theory) , code of practice , thermodynamics , materials science , engineering , mathematics , physics , computer science , algorithm , programming language , set (abstract data type) , engineering ethics
Abstract A commercial computation fluid dynamics (CFD) code was used to compute the discharge coefficient for a representative relief valve configuration and various nozzle sizes, for Newtonian liquids with various viscosities. The results are compared with values of the viscosity correction factor, K v , from the API Recommended Practice 520, and equations are proposed to represent both the K v curve and the computational results in a correspondings form, which also includes the effect of the dimensionless nozzle diameter on the valve K v .