Experimental confirmation of cyclic thermal joint conductance

Mckinzie, D. J.

doi:10.2514/6.1970-853

Cited by 2 publications

(3 citation statements)

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“…Some investigations [211][212][213][214][215] and references given in [3] show that the conductance is sensitive to the direction of the heat flow applied, especially when the junction is made of dissimilar materials. This effect, so-called thermal rectification, could have a potential for applications like thermal switches.…”

Section: Heat Flow Direction/directional Dependence and Other Topicsmentioning

confidence: 99%

“…Special topics in heat transfer are heat conductance in stacks, and thin laminates (see [3]), avoidance of heat of radiation at higher temperatures by an interposed heat shield which has not yet been studied systematically to allow generally valid conclusions, and hysteresis when the load varies cyclically [215][216][217]. Theoretical results are available for bolted, riveted and cylindrical joints [3, 75, 148, 150-152, R30 Thermal boundary resistance of mechanical contacts [217][218][219], also with differential thermal expansion (often used in cryogenic constructions) as well as for soldered or brassed junctions [32,153] which create non-uniform stress on the interface (thus requiring modification of the usual heat transport theory) and effects of stress-freezing techniques [219].…”

Section: Heat Flow Direction/directional Dependence and Other Topicsmentioning

confidence: 99%

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Thermal boundary resistance of mechanical contacts between solids at sub-ambient temperatures

Gmelin

Asen-Palmer

Reuther

et al. 1999

J. Phys. D: Appl. Phys.

122

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The experimental values of the thermal boundary resistance occurring at interfaces between two solids at sub-ambient temperatures are reviewed. New data are presented in the temperature range from 4 K to 300 K for the thermal resistance between different metals (Cu, stainless steel), interlayered by various cryogenic bonding agents (Apiezon-N, Cryocon grease, In and InGa), or mechanically connected (dry) contacts. Depending on the contact materials, the thermal conductance varies between 10 2 W m −2 K −1 and 5 × 10 4 W m −2 K −1 at room temperature, and decreases approximately linearly by one order of magnitude between 200 K and 20 K. Our experimental data agree well with the data reported in the literature for the temperature range below 4 K and measurements near room temperature.

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Section: Heat Flow Direction/directional Dependence and Other Topicsmentioning

confidence: 99%

Section: Heat Flow Direction/directional Dependence and Other Topicsmentioning

confidence: 99%

Thermal boundary resistance of mechanical contacts between solids at sub-ambient temperatures

Gmelin

Asen-Palmer

Reuther

et al. 1999

J. Phys. D: Appl. Phys.

122

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show abstract

“…Thermal contact conductance is a complex phenomenon and dif®cult to predict. However, because of its importance in engineering, it has attracted the attention of many researchers in recent years, resulting in numerous publications on this subject, for instant, Mckinzie [1], Howard [2], Ozisik and Vick [3] and Ozisik and Flach [4].…”

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confidence: 99%

A nonlinear inverse problem for the prediction of local thermal contact conductance in plate finned-tube heat exchangers

Huang

Jang

2001

Heat and Mass Transfer

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A nonlinear inverse problem utilizing the Conjugate Gradient Method (CGM) of minimization is used successfully to estimate the temporally and circumferentially varying thermal contact conductance of a plate ®nned-tube heat exchanger by reading the simulated transient temperature measurement data from the thermocouples located on the plate. The thermal properties of the ®n and tube are assumed to be functions of temperature, and this makes the problem nonlinear. It is assumed that no prior information is available on the functional form of the unknown thermal contact conductance in the present study, thus, it is classi®ed as the function estimation in the inverse calculation. The accuracy of the inverse analysis is examined by using the simulated temperature measurements. Finally the inverse solutions with and without the consideration of temperature-dependent thermal properties are compared. Results show that when the nonlinear inverse calculations are performed an excellent estimation on the thermal contact conductance can be obtained with any arbitrary initial guesses within a couple of minute's CPU time on a HP-730 workstation.

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Experimental confirmation of cyclic thermal joint conductance

Cited by 2 publications

References 0 publications

Thermal boundary resistance of mechanical contacts between solids at sub-ambient temperatures

Thermal boundary resistance of mechanical contacts between solids at sub-ambient temperatures

A nonlinear inverse problem for the prediction of local thermal contact conductance in plate finned-tube heat exchangers

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