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Modified shape factors for improved viscosity predictions using corresponding states
Author(s) -
Monnery Wayne D.,
Mehrotra Anil K.,
Svrcek William Y.
Publication year - 1991
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450690523
Subject(s) - viscosity , shape factor , propane , thermodynamics , hydrocarbon , materials science , statistical physics , mathematics , chemistry , physics , geometry , organic chemistry
A new approach for evaluating the shape factors in the Extended Corresponding States Method is presented for improving the viscosity predictions of pure liquid hydrocarbons. Of the two shape factors in the method, the size shape factor ϕ is shown to be unnecessary. The energy shape factor θ is shown to correlate with the reduced temperature. Next, the correlation parameters are generalized for each family of hydrocarbon compounds. A further simplification in the viscosity calculation is accomplished by use of propane as the reference fluid whose density is calculated from the COSTALD method. The predicted viscosities of 46 pure liquid hydrocarbons are well within 6% of the data, and an order of magnitude better than those from available methods.