Results from a mathematical modelling of the process of explosive boiling of bio-oil droplets reveal that at otherwise identical conditions larger droplets require longer time to explode. An increase of the volumetric heating source leads to a reduction of the pre-explosion time. Droplets that contain more moisture require longer time to explode, possibly because of the larger thermal inertia of water compared with that of the solid residues. According to the model, explosion is impossible at low levels of the volumetric heating source. Solids suspended in the liquid core can act as heterogeneous nucleation sites and can lower the transition temperature of the liquid into a vapour phase. Since bio-oil contains suspended solid particulates, a redefinition of the transition limit as a function of the droplet fluid composition and the presence of solid nucleation sites is required.
|Number of pages||4|
|Publication status||Published - 1 Dec 2005|
|Event||5th Asia-Pacific Conference on Combustion, ASPACC 2005 - Adelaide, Australia|
Duration: 17 Jul 2005 → 20 Jul 2005
|Conference||5th Asia-Pacific Conference on Combustion, ASPACC 2005|
|Period||17/07/05 → 20/07/05|