Ex-Reactor Determination of Thermal Contact Conductance between Uranium Dioxide:Zircaloy-4 Interfaces

1983 ◽  
pp. 221-232 ◽  
Author(s):  
S. Begej ◽  
J. E. Garnier ◽  
A. O. Desjarlais ◽  
R. P. Tye
Keyword(s):  
Thermal Contact ◽  
Thermal Contact Conductance ◽  
Contact Conductance

scholarly journals Determination of thermal contact conductance in vacuum-bagged thermoplastic prepreg stacks using infrared thermography

2016 ◽  
Author(s):  
Théo Baumard ◽  
Olivier De Almeida ◽  
Gary Menary ◽  
Yannick Le Maoult ◽  
Fabrice Schmidt ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Thermal Contact ◽  
Thermal Contact Conductance ◽  
Contact Conductance

Combined Parameter and Function Estimation in Heat Transfer With Application to Contact Conductance

1988 ◽  
Vol 110 (4b) ◽  
pp. 1046-1058 ◽  
Author(s):  
J. V. Beck
Keyword(s):  
Heat Transfer ◽  
Parameter Estimation ◽  
Heat Conduction Problem ◽  
Thermal Contact ◽  
Temperature Measurements ◽  
Thermal Contact Conductance ◽  
Transient Temperature ◽  
Function Estimation ◽  
Contact Conductance

This paper discusses parameter estimation, function estimation, and a combination of the two. An example of parameter estimation is the determination of thermal conductivity of solids from transient temperature measurements. An example of function estimation is the inverse heat conduction problem, which uses transient temperature measurements to determine the surface heat flux history. The examples used herein involve the determination of the thermal contact conductance. Two sets of very good data are analyzed. One set of steady-state data was obtained by Antonetti and Eid (1987). The other set was obtained by Moses and Johnson (1986) under transient conditions for periodic contact. Both sets of data are used to illustrate parameter, function, and combined estimation. It is demonstrated that the proposed methods are more powerful then commonly accepted methods. Many other heat transfer problems can be treated using the proposed techniques.

Thermal Contact Conductance of a Bone-Dry Paper Handsheet/Metal Interface

1992 ◽  
Vol 114 (2) ◽  
pp. 326-330 ◽  
Author(s):  
J. Seyed-Yagoobi ◽  
K. H. Ng ◽  
L. S. Fletcher
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Water Retention ◽  
Thermal Contact ◽  
Thermal Contact Conductance ◽  
Metal Interface ◽  
Contact Conductance ◽  
Interface Contact ◽  
Sheet Density

An apparatus was constructed for determination of the thermal contact conductance for a paper handsheet/metal interface and for measurement of the effective thermal conductivity of handsheet samples. Bone-dry Bleached Southern Mixed Kraft hand-sheets with a water retention value of 1.832 were used to study the effect of pressure on thermal contact conductance and to measure the effective thermal conductivity of samples at various sheet density levels. A regression model describing the interface thermal contact conductance as a function of pressure and basis weight was derived. The contact conductance increases with increasing pressure or with decreasing basis weight. At a pressure of 2.3 kPa, the value of the interface contact conductance for the bone-dry samples considered ranges from approximately 97 W/m2K for a sheet of 348.7 g/m2 basis weight to 200 W/m2K for a sheet of 68.0 g/m2 basis weight. For pressures near 300 kPa, these values increase to 146 and 452 W/m2K, respectively. The effective thermal conductivity of the handsheet samples was derived from measured values of overall joint conductance and interface contact conductance. The results indicate that the thermal conductivity of the bone-dry samples increases with increasing sheet density, ranging from 0.14 W/mK to 0.70 W/mK for sheet densities of 90 kg/m3 to 500 kg/m3, respectively, for the samples considered.

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