Surface Tension of Seawater
Author(s)Nayar, Kishor Govind; Panchanathan, Divya; McKinley, Gareth H.; Lienhard, John H.
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New measurements and a reference correlation for the surface tension of seawater at atmospheric pressure are presented in this paper. Surface tension of seawater was measured across a salinity range of 20 ⩽ S ⩽ 131 g/kg and a temperature range of 1 ⩽ t ⩽ 92 °C at atmospheric pressure using the Wilhelmy plate method. The uncertainty within measurements varied from 0.18 to 0.37 mN/m with the average uncertainty being 0.22 mN/m. The experimental procedures were validated with tests conducted on ACS reagent grade water and aqueous sodium chloride solutions. Literature data and present measurements were evaluated and a reference correlation was developed expressing surface tension of seawater as a function of temperature and salinity. The average absolute percentage deviation between measurements and the correlation was 0.19% while the maximum deviation was 0.60%.
DepartmentMassachusetts Institute of Technology. Abdul Latif Jameel World Water & Food Security Lab; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal of Physical and Chemical Reference Data
American Institute of Physics (AIP)
Nayar, K. G., D. Panchanathan, G. H. McKinley, and J. H. Lienhard. “Surface Tension of Seawater.” Journal of Physical and Chemical Reference Data 43, no. 4 (December 2014): 043103.
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