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Investigation on heat transfer between two coaxial cylinders for measurement of thermal accommodation coefficient
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10.1063/1.4726059
/content/aip/journal/pof2/24/6/10.1063/1.4726059
http://aip.metastore.ingenta.com/content/aip/journal/pof2/24/6/10.1063/1.4726059

Figures

Image of FIG. 1.
FIG. 1.

Schematic image of the experimental apparatus.

Image of FIG. 2.
FIG. 2.

Analog electrical circuit to maintain the platinum thin wire temperature constant.

Image of FIG. 3.
FIG. 3.

Schematic image of potential lead and measured voltage to avoid the edge effect.

Image of FIG. 4.
FIG. 4.

Cross-sectional schema of the heat transfer between coaxial cylinders.

Image of FIG. 5.
FIG. 5.

Normalized distributions on (a) pressure and (b) temperature, according to Eq. (A1), in the gap between the cylinders, solid line Ar12 case, dashed line Ar19 case, δ = 0.05.

Image of FIG. 6.
FIG. 6.

Pressure dependence of the heat flux between cylinders, the experimental values (• symbols), the results of numerical simulation (– solid line), fitting curve by relation (2) (−− dashed line), see Table I.

Image of FIG. 7.
FIG. 7.

Heat flux between the cylinders, normalized by the corresponding free molecular value, Eq. (1). The measured values (• symbols), the results of numerical simulation (– solid line), fitting curve by relation (2) (−− dashed line), see Table I.

Image of FIG. 8.
FIG. 8.

Reference value on the normalization, which is heat flux in the free molecular regime q FM , Eq. (1) (– solid line) compared with the residual |qq e | of the measured values q e to fitting curve q, relation (2) (• symbols).

Image of FIG. 9.
FIG. 9.

The temperature dependence of the thermal accommodation coefficient: the accommodation coefficient was measured for 4 times for each experimental condition to show the repeatability.

Tables

Generic image for table
Table I.

The experimental conditions: the average values of the temperatures of the internal T H and the external T C cylinders.

Generic image for table
Table II.

The accommodation coefficient obtained from the experiments.

Generic image for table
Table III.

The heat flux q r in the middle point (r = 0.75) vs rarefaction parameter δ for the case T H /T C = 2 and R C /R H = 2.

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/content/aip/journal/pof2/24/6/10.1063/1.4726059
2012-06-08
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Investigation on heat transfer between two coaxial cylinders for measurement of thermal accommodation coefficient
http://aip.metastore.ingenta.com/content/aip/journal/pof2/24/6/10.1063/1.4726059
10.1063/1.4726059
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