The mathematical modeling and simulation on abnormal evaporation of spilled oil at low temperature

In order to predict the evaporative amount of spilled oil at low temperature,the shallow dish test was conducted to investigate the evaporation of diesel and Daqing crude oil,respectively. On the basis of the mixed liquid evaporation mechanism,Fingas’evaporation models were ameliorated by adding a coefficient e-k/θ. The experimental results indicate that the ameliorated models are adopted when the difference between air temperature and the oil’s solidifying point (θ) is less than 10 ℃. The volatile components come into the air from the oil surface within a certain depth(h),which decreases as T decreases. The resistance coefficient k is 0. 993 and 0. 989 for the diesel and crude oil,respectively. The evaporation of oil on the water surface infested with ice is closely related to the exposed area (Af) and thickness (ho) of the oil slick,which can be simulated by the model appended with (Afhoe-k/θ) /V. The ameliorated models can simulate the oil evaporation very well at low temperature.