Comparative Study of Droplet Impact Characteristics with Various Viscous Liquids: A Study of Both Miscible and Immiscible Droplet Impacts

Droplet impact on the liquid surface with sufficient impact strength results in splashing; it is an undesirable parameter in many applications, especially in the case of fire extinguishing. To design the fire extinguishing equipment, one must know the droplet impacts characteristics before starting the fire extinguishing. Both the miscible and immiscible droplet impacts were considered for the current investigation. For the experiments, five different viscous liquids (water, petrol, kerosene, diesel and rice-bran oil) for the droplet impacts and four different liquids (petrol, kerosene, diesel and rice-bran oil) for liquid pool. Different velocities are considered as a function of three droplet impact heights to link impact strength and impact characteristics. The jet height and the secondary droplet diameters were measured using the image processing techniques and efforts to relate them with the non-dimensional numbers.