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Thermal transpiration flow: A circular cross-section microtube submitted to a temperature gradient
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10.1063/1.3561744
/content/aip/journal/pof2/23/3/10.1063/1.3561744
http://aip.metastore.ingenta.com/content/aip/journal/pof2/23/3/10.1063/1.3561744
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental setup scheme: circular cross-section microtube connected to two reservoirs, vacuum pump, heater, acquisition system, pressure gauges (CDG), three thermocouples, regulation valves, and high-pressure gas tanks.

Image of FIG. 2.
FIG. 2.

Helium . (1) Initial pressure equilibrium stage. (2) Stationary transitional stage. (3) Nonstationary transitional stage. (4) Final pressure equilibrium stage.

Image of FIG. 3.
FIG. 3.

Nitrogen . (a) Example of the pressure variation in time for and superposed the corresponding numerical fit. (b) Pressure variation in time fitting curves; each curve represents a different gas rarefaction condition. (c) Pressure-variation speed curves in time. (d) Pressure-variation speed curves logarithmic scale in time.

Image of FIG. 4.
FIG. 4.

Thermomolecular pressure difference in function of the rarefaction parameter delta for three imposed temperature differences , 60, and . (a) Helium. (b) Nitrogen.

Image of FIG. 5.
FIG. 5.

Mass flow rate for three imposed temperature differences , 60, and . (a) Helium in function of the rarefaction parameter . (b) Nitrogen in function of the rarefaction parameter . (c) Helium and nitrogen in function of the pressure.

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/content/aip/journal/pof2/23/3/10.1063/1.3561744
2011-03-09
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermal transpiration flow: A circular cross-section microtube submitted to a temperature gradient
http://aip.metastore.ingenta.com/content/aip/journal/pof2/23/3/10.1063/1.3561744
10.1063/1.3561744
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