A Study of the Occurrence of Microexplosion in a Single Water-in-Oil Emulsion Droplet

Coupling multicomponent droplet evaporation and tabulated chemistry combustion models for large-eddy simulations

“…Experimental data for the evaporation of hexadecane-water droplets has been obtained from Morozumi [37] and it is plotted in Fig. 6 together with the model results.…”

“…6. Model results of the droplet diameter evolution for water-in-hexadecane emulsion droplets at atmospheric pressure compared against experimental data from Morozumi [37]. Fig.…”

“…The latter is also supported by Fu [36], who states that an oil layer is created for both W/O and O/W emulsion types. More recently, Morozumi [37] proposed a 1-D model that accounts for the transfer of heat from the fuel to the dispersed water droplets by considering an additional temperature variable for the water. For the prediction of the microexplosion phenomena, the homogeneous nucleation approach [31] is commonly used to determine the superheat temperature at which this event occurs.…”

Breakup Characteristics of Water-in-Oil Emulsion Droplets Influenced by a Rigid Interfacial Film in the Presence of a Polymer Surfactant

“…However, in some cases, droplets always break up partially and weakly, which can be distinguished as another breakup mode. , The heating time until breakup (delay time) and critical temperature triggering the droplet breakup are two significant breakup characteristics of W/O droplets. Emulsion properties, such as the water content, − particle size of the dispersed phase, − and viscosity of the continuous phase, , have been revealed to be closely related to the micro-explosion of W/O droplets. Surfactants also play a significant role in the breakup of emulsified oil. ,, The temperature and delay time of micro-explosion were found to be increased with the increase in surfactant concentration due to the rapid increase in interfacial tension at high temperatures .…”