A New Approach Toward Improving our Understanding of Electrically Enhanced Coalescence
Resort to use of published analytical or theoretical treatments on electrostatic coalescence were unsuccessful in either explaining or correlating the data presented herein. An inspectional analysis of the charge transport conservation equations used to analyze static charge generation accompanying flow of hydrocarbon fuels, coupled with the accepted principles for two-phase flow was used to delineate the principal independent variables that coalescence rate depends upon. Dimensional analysis using the Buckingham π method and Langhaar's matrix formulation in the mass (M), length (L), time (T) and Charge (coulomb, C) formulation was used to show that the dimensionless coalescence rate is a function of seven independent dimensionless groups. For the fixed geometry employed herein and for Isopar® M emulsions, only the ratio of two dimensionless groups (i.e., π7/π6) was needed to correlate A.C. data at 60 and 120 Hz with a regression coefficient, R2, ranging from 0.86 to 0.94. The physical significance of the groups are discussed and future studies are recommended.
Keywords: CHARGE TRANSPORT CONSERVATION EQUATIONS; DIMENSIONAL ANALYSIS; DISPERSED PHASE ELECTRICAL CONDUCTIVITY; ELECTROSTATIC COALESCENCE; KEY DIMENSIONLESS GROUPS; LIGHT AND INTERMEDIATE CRUDE OILS
Document Type: Research Article
Publication date: 2016-09-01
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