Oscillation behavior and heat transfer involving opposed spilling fire spread over n-butanol with various slope angles

Spilling fire possibly occurs from accidental collision, friction or corrosion of oil tank or pipeline. This behavior is essentially related to multi-phase flows and heat transfer. Most of previous researchers focus on the behaviors of concurrently spilling fire in which the spilling fire spread is in the same direction as the liquid flow, while the research on opposed spilling fire is rare. In this work, the opposed spilling fire tests are carried out using the fuel spilling trench with length × width = 100 cm × 20 cm. The spatial temperature distribution, mass loss rate and flame radiation involving opposed spilling fire are measured and analyzed. The hydrodynamic equilibrium model of opposed spilling fire is established incorporating viscous friction, inertia force, gravity, and surface tension. Based on the hydrodynamics analysis of subsurface flow region, the critical discharge flow rate is calculated, and the relative deviation between theoretical and experimental value is smaller than 10%. The heat transfer modes involving the opposed spilling fire are theoretically analyzed and compared under various discharge rates. With an increase in discharge rate, the main heat dissipation mode changes gradually from the bottom-plate heat dissipation to the heat transfer through the forced convection.