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TECHNICAL PAPERS

Distortion in Thermal Field Around Inserted Thermocouples in Experimental Interfacial Studies, Part 4: End Effect

[+] Author and Article Information
M. H. Attia

Dept., Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada

A. Cameron, L. Kops

Department of Mechanical Engineering, McGill University, Montreal, Quebec, Canada

J. Manuf. Sci. Eng 124(1), 135-145 (Mar 01, 2000) (11 pages) doi:10.1115/1.1419199 History: Received March 01, 1999; Revised March 01, 2000
Copyright © 2002 by ASME
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References

Figures

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Schematic representation of the orientation of the thermocouple installation in relation to the hot and cold surfaces (A and B) and the adiabatic surfaces C on the test block
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Three-dimensional finite element idealization of (a) the half block with the thermocouple installation, and (b) a close-up of the equivalent thermocouple wire, insulation and filler material
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Three-dimensional representation of the dimensionless disturbed temperature field ϕ around and below a perfectly insulated flat-ended hole
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Iso-surfaces of the dimensionless parameter ϕ around the flat-ended hole, in which the thermocouple assembly is inserted (kf=0.35 W/mK,kb=6.14 W/mK, and kt=204.27 W/mK)
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The ϕ-isolines in the region surrounding a hole in a stainless steel block, using E-type thermocouple assembly and low conductivity cement (kf=0.35 W/mK): (a) in the plane passing through the bottom of the hole, and (b) in the axial plane, y=0, parallel to the direction of heat flow
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The ϕ-isolines in the region surrounding a hole, using low conductivity cement (kf=0.35 W/mK) and T-type thermocouple, in a block made of: (a) stainless steel, and (b) ceramic
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The ϕ-isolines in the region surrounding a hole, using high conductivity cement (kf=86.6 W/mK) and T-type thermocouple in a block made of: (a) stainless steel, and (b) ceramic
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The ϕ-isolines in the region surrounding a hole in a carbon steel block, using medium conductivity cement (kf=3.50 W/mK) and J-type thermocouple which is: (a) concentric with the hole, and (b) touching the up-stream side of the hole
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Effect of the partial heat flow ratio ε on the dimensionless temperature measurement error ϕav: A: kf=86.6 W/mK, and B: kf=0.35 W/mK
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Rectification of the dimensionless temperature measurement error ϕav, using the modified partial heat flow parameter ξ=ε(kt/kf)n
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Schematic representation of the experimental set-up
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Comparison between measured and predicted temperatures near the bottom of a perfectly insulated hole

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