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EFFECT of FILLING MATERIAL ON the TEMPERATURE DISTRIBUTION IN A THERMAL CONDUCTIVITY PROBE and THERMAL CONDUCTIVITY MEASUREMENTS: A NUMERICAL STUDY 1
Author(s) -
KARWE M.V.,
TONG C.H.
Publication year - 1991
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/j.1745-4549.1991.tb00177.x
Subject(s) - thermal conductivity , thermocouple , temperature gradient , materials science , thermal conductivity measurement , thermal conduction , thermal , conductivity , composite material , thermodynamics , chemistry , meteorology , physics
ABSTRACT A numerical investigation taking into account the composite nature of a line thermal conductivity probe was carried out using a finite‐difference technique, to study the temperature distribution inside a thermal conductivity probe for different filling materials. Air, mercury and a high thermal conductivity paste were used as the filling materials. the radial temperature gradient in a mercury filled probe was small, while a large temperature gradient was forund in an air filled probe. It was found that the lacoation of the thermocouple in the probe has very little or no effect on the calculated thermal conductivity values, for all three filling materials tested. the plots of temperature rise versus natural logarithm of time