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Experimental investigation of self-induced thermocapillary convection for an evaporating meniscus in capillary tubes using micro–particle image velocimetry
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10.1063/1.1901688
/content/aip/journal/pof2/17/5/10.1063/1.1901688
http://aip.metastore.ingenta.com/content/aip/journal/pof2/17/5/10.1063/1.1901688

Figures

Image of FIG. 1.
FIG. 1.

Experimental arrangement for standard PIV (from Ref. 4 ).

Image of FIG. 2.
FIG. 2.

Schematic diagram of the experimental setup ( is the gravitational acceleration).

Image of FIG. 3.
FIG. 3.

Marangoni convection pattern: (a) flow visualization with the use of ordinary light; (b) PIV analysis showing the vector map with streamlines and superimposed vorticity map.

Image of FIG. 4.
FIG. 4.

Light path for optical distortion correction.

Image of FIG. 5.
FIG. 5.

Horizontal diametrical section of the capillary tube: (a) typical PIV visualization with the use of coherent light; (b) PIV analysis.

Image of FIG. 6.
FIG. 6.

Vertical diametrical section of the capillary tube: (a) typical PIV visualization with the use of coherent light; (b) PIV analysis ( is the gravitational acceleration).

Image of FIG. 7.
FIG. 7.

PIV analysis of the horizontal diametrical section for ethanol (above) and methanol (below) at various tube sizes.

Image of FIG. 8.
FIG. 8.

Vorticity vs tube diameter (horizontal tube sections).

Image of FIG. 9.
FIG. 9.

Sequence of 12 PIV analysis frames for methanol and 900 μm tube (vertical diametrical section).

Image of FIG. 10.
FIG. 10.

Sequence of six PIV analysis frames for methanol in the 600 μm tube (vertical diametrical section).

Image of FIG. 11.
FIG. 11.

Sequence of six PIV analysis frames for methanol in the 1630 μm tube (vertical diametrical section).

Image of FIG. 12.
FIG. 12.

Sequence of six PIV analysis frames for ethanol in the 600 μm tube (vertical diametrical section).

Image of FIG. 13.
FIG. 13.

Sequence of six PIV analysis frames for ethanol in the 600 μm tube (horizontal diametrical section).

Image of FIG. 14.
FIG. 14.

Vorticity vs time for ethanol in the 900 μm tube (vertical diametrical section).

Image of FIG. 15.
FIG. 15.

Temperature difference and driving forces for horizontal and vertical diametrical tube sections ( is the gravitational acceleration and is the surface tension).

Image of FIG. 16.
FIG. 16.

Normalized vorticity vs tube diameter for horizontal diametrical tube sections.

Image of FIG. 17.
FIG. 17.

Dimensionless number vs tube diameter for horizontal diametrical tube sections.

Tables

Generic image for table
Table I.

Liquids physical properties (at 1 atm and 25 °C from Ref. 34 ).

Generic image for table
Table II.

Dimensionless numbers (Marangoni, Rayleigh, Bond, and Capillary number).

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/content/aip/journal/pof2/17/5/10.1063/1.1901688
2005-04-28
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental investigation of self-induced thermocapillary convection for an evaporating meniscus in capillary tubes using micro–particle image velocimetry
http://aip.metastore.ingenta.com/content/aip/journal/pof2/17/5/10.1063/1.1901688
10.1063/1.1901688
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