Investigation of heating up and evaporation processes of fluids in storage tanks by experiments and by numerical simulation

Experiments were performed to investigate heating up processes of fluids in storage tanks under the in-fluence of an external heat source. As a con-se-quence of an external fire, the heat-up of the inventory may lead to the evaporation of the liquid and to release of significant quan-tities of dan-ge-rous gases into the envi-ron-ment. Several tests were performed both with heating from the bottom and with heating from the side walls. In recent tests in addition to thermocouples, the tank was equipped with needle probes for measuring of the local void fraction.
The paper presents experimental and numerical investigations of single and two phase heating up processes of tanks with side wall heating. The measurement of the temperature and of the void fraction makes interesting phenomena evident. which could be explained by an own 2D model. The gained experimental results may be used for the validation of boiling models in 3-D CFD codes.