Papers presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 20-23 July 2015.
Storage of hazardous products requires utilizing
containment systems such as diking against the unintended
release of these materials. In case of volatile compounds, the
liquid contained by the dike will offer a large surface for
evaporation. It is of major importance to calculate the
evaporation rate since evaporation may create a toxic or
flammable cloud. This study aimed to study the temperature
distribution in a liquid pool during evaporation. Vertical and
horizontal temperature distributions were recorded by a series
of thermocouples and an infrared camera. Evaporation
experiments were performed with acetone in a wind channel
facility. Vertical experimental data highlight a thin cold liquid
layer at surface which remains during the evaporation and the
liquid level decrease. This influences strongly the evaporation
rate. On the horizontal consideration, surface gradients were
observed when cavity flow occurs. These gradients are not
believed to influence significantly the overall evaporation rate.
A focus was done on the error induced when considering only
mean liquid temperature instead of a distributed profile on
several correlations from literature.