Water: A Fluid Complex
16:00 Aula 300
Miércoles 12 Junio 2013
Water: A Fluid Complex
While in most materials the decreasing of the temperature results in a monotonic increasing
behavior of the density, the water, at room pressures, has a maximum in its density at 4oC.
Furthermore, it is observed that water has an anomalous increase of compressibility between 0.1
MPa and 190 MPa and, at atmospheric pressure, an increase of isobaric heat capacity upon cooling.
The diffusion coefficient for water has a maximum at 4oC for 1.5 atm, whereas for normal liquids
it increases with the decrease of pressure. In this seminar we review these anomalies and propose
that they can be explained in the framework of a two length scale potential. Employing computer
simulations we show that this type of effective potential is capable of reproduce the water anomalies.