The classical molecular dynamics method is applied to simulate the surface tension of water over the wide temperature range from 193 to 398 K. The results show that the temperature dependence of surface tension obviously increases in supercooled region, and there exists a second inflection point in the surface tension-temperature curve at about 303 K similar to the first one at 525 K, which confirms the conjecture based on the experimental measurements. When the temperature approaches 180 K, the simulated surface tension displays a sharp rise like the anomalies of some bulk thermodynamic properties. (c) 2006 American Institute of Physics.
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