Premium
NATURAL CONVECTION HEAT TRANSFER BETWEEN NON‐NEWTONIAN FLUIDS and an IRREGULAR SHAPED PARTICLE 1
Author(s) -
ALHAMDAN A.,
SASTRY S.K.
Publication year - 1990
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1990.tb00062.x
Subject(s) - nusselt number , thermodynamics , rayleigh number , viscosity , heat transfer , natural convection , chemistry , convective heat transfer , convection , particle (ecology) , heat transfer coefficient , aqueous solution , physics , reynolds number , oceanography , turbulence , geology
Natural convection heat transfer was investigated between aqueous solutions of sodium carboxymethylcellulose (modeled as power law fluids) and a mushroom shaped particle, under transient conditions, with various initial temperature differences. Convective heat transfer coefficients (h) were observed to decrease over time due to thermal equilibration. the average value of h was significantly higher for heating (75 to 310 w/m 2 ‐C) than for cooling (22 to 153 w/m 2 . C), and decreased with increasing viscosity (CMC concentration). For the lower viscosity ranges, h increased significantly with increasing initial temperature difference. Correlations were developed between Nusselt number and generalized Rayleigh and Fourier numbers.