The Marangoni effect on the critical heat flux (CHF) condition in pool boiling of binary mixtures has been identified and its effect has been quantitatively estimated with a modified model derived from hydrodynamics. The physical process of CHF in binary mixtures, and models used to describe it, are examined in the light of recent experimental evidence, accurate mixture properties, and phase equilibrium revealing a correlation to surface tension gradients and volatility. A correlation is developed from a heuristic model including the additional liquid restoring force caused by surface tension gradients. The CHF condition was determined experimentally for saturated methanol/water, 2-propanol/water, and ethylene glycol/water mixtures, over the full range of concentrations, and compared to the model. The evidence in this study demonstrates that in a mixture with large differences in surface tension, there is an additional hydrodynamic restoring force affecting the CHF condition.

Issue Section:
Boiling and Condensation
Keywords:
Boiling, Phase-Change Phenomena
Topics:
Critical heat flux, Pool boiling, Surface tension, Water, Boiling, Hydrodynamics, Methanol, Phase equilibrium, Volatility
1.
Bonilla, C. F., and Perry, C. W., 1941, “Heat Transmission to Boiling Binary Liquid Mixtures,” Chemical Engineering Progresses Symposium Series, Vol. 37, pp. 685–705.
2.
Haramura
Y.
, and
Katto
Y.
,
1983
, “
A New Hydrodynamic Model of Critical Heat Flux, Applicable Widely to Both Pool and Forced Convection Boiling on Submerged Bodies in Saturated Liquids
,”
International Journal of Heat and Mass Transfer
, Vol.
26
, pp.
389
–
399
.
3.
Hovestreijdt
J.
,
1963
, “
The Influence of the Surface Tension Difference on the Boiling of Mixtures
,”
Chemical Engineering Science
, Vol.
18
, pp.
631
–
639
.
4.
Kutateladze, S. S., Bobrovich, G. I., Gogonin, I., Mamontova, N. N., and Moskvichova, V. M., 1966, “The Critical Heat Flux at the Pool Boiling of Some Binary Liquid Mixtures,” Proceedings at the 3rd International Heat Transfer Conference, Chicago, Vol. 3, pp. 149–159.
5.
Matorin
A. S.
,
1973
, “
Correlation of Experimental Data on Heat Transfer Crisis in Pool Boiling of Pure Liquids and Binary Mixtures
,”
Heat Transfer—Soviet Research
, Vol.
5
, No.
1
, pp.
85
–
89
.
6.
McEligot
D. M.
,
1964
, “
Generalized Peak Heat Flux for Dilute Binary Mixtures
,”
AIChE Journal
, Vol.
10
, No.
1
, pp.
130
–
131
.
7.
McGillis, W. R., 1993, “Boiling From Localized Heat Sources in Pure and Binary Fluid Systems,” Ph.D. dissertation, University of California—Berkeley.
8.
Prausnitz, J. M., Lichtenthaler, R. N., and Gomes de Azevedo, E., 1986, Molecular Thermodynamics of Fluid-Phase Equilibria, 2nd ed., Prentice-Hall, New Jersey.
9.
Pransnitz, J. M., 1992–1993, Conversations and Class Notes—Molecular Thermodynamics of Fluid-Phase Equilibria, Department of Chemical Engineering, University of California, Berkeley.
10.
Reddy
R. P.
, and
Lienhard
J. H.
,
1989
, “
The Peak Boiling Heat Flux in Saturated Ethanol–Water Mixtures
,”
ASME JOURNAL OF HEAT TRANSFER
, Vol.
111
, pp.
480
–
486
.
11.
Reid, R. C., Prausnitz, J. M., and Poling, B. E., 1987, The Properties of Gases & Liquids, 4th ed., McGraw-Hill, New York.
12.
Sun
K. H.
, and
Lienhard
J. H.
,
1970
, “
The Peak Pool Boiling Heat Flux on Horizontal Cylinders
,”
International Journal of Heat and Mass Transfer
, Vol.
13
, pp.
1425
–
1439
.
13.
Thome
J. R.
, and
Shock
A. W.
,
1984
, “
Boiling of Multicomponent Liquid Mixtures
,”
Advances in Heat Transfer
, Academic Press, Inc., New York, Vol.
16
, pp.
59
–
156
.
14.
Van Stralen
S. J. D.
,
1956
, “
Heat Transfer to Boiling Binary Liquid Mixtures at Atmospheric and Subatmospheric Pressures
,”
Chemical Engineering Science
, Vol.
5
, pp.
290
–
296
.
15.
Van Stralen
S. J. D.
, and
Sluyter
W. M.
,
1969
, “
Investigations on the Critical Heat Flux of Pure Liquids and Mixtures Under Various Conditions
,”
International Journal of Heat and Mass Transfer
, Vol.
12
, pp.
1353
–
1384
.
16.
Zuber, N., 1959, “Hydrodynamic Aspects of Boiling Heat Transfer,” AEC Report No. AECU-4439, Physics and Mathematics.
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