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Title:	Correlation of Curtis and Gullett equation for viscosity of non-Newtonian suspensions and Franks and Rinaldi equation for heat transfer coefficients
Author:	Wisla, Irene S.
View Online:	njit-etd1956-001 ([5], 66 pages ~ 7.8 MB pdf)
Department:	Department of Chemical Engineering
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Salamone, Jerome J. (Committee chair) Mantell, C. L. (Committee member) Joffe, Joseph (Committee member)
Date:	1956
Keywords:	Viscosity
Availability:	Unrestricted
Abstract:	Curtis and Gullett (7) developed an equation correlating the effect of velocity, concentration and particle size on apparent viscosity of non-Newtonian water slurries. μ/μw=1.02(AK/GC).105 The object of this paper was to determine the validity of using the viscosity, as determined by the Curtis-GulLett (7) equation, in predicting the heat transfer coefficient of non-Newtonian fluids, where the suspending medium is something other than pure water . The authors used various concentrations of sugar solutions as the dispersion medium, for the slurries. A dimensionless equation resembling the flittusBoelter equation with modified exponents and additional dimensionless groups has been developed by J.J. Salamone (14): HD/Kf=.131(DVbPb/ μb).62(Cs/Cf).35(Cfμb/Kf).72(D/Ds).05(Ks/Kf).05 Franks and Rinaldi (8) found the magnitude of the exponents to be as follows: HD/Kf=.0138(DVbPb/ μb).8(Cs/Cf).42(Cfμb/Kf).79(D/Ds).106(Ks/Kf).05 Experimentally determined heat transfer coefficients deviated from the values calculated by the Franks and Rinaldi (8) equation by 16%. This is what was expected, since the Curtis and Gullett (7) equation is accurate to 14.4%, the authors of this paper feel this equation may be used to obtain the viscosity of a slurry in predicting the magnitude of the heat transfer coefficient. The authors feel that a sufficient amount of experimental data has been obtained in determining the validity of the Franks and Rinaldi(8) equation for predicting heat transfer coefficients of' non-newtonian fluids, but additional work of a statistical nature is recommended in re-evaluating the exponents of the Franks and Rinaldi(S) equation. in the light of all available data. Closer agreement between experimental and calculated values for heat transfer coefficients would result.