What additional factor is necessary for atomization along with time and mixture?

The process of atomization, particularly in the context of high-pressure boilers, involves breaking a liquid into fine droplets to ensure efficient combustion. Time and mixture refer to the duration that the liquid spends in the atomization process and the characteristics of the fuel-air mixture, respectively. However, temperature plays a pivotal role in this process as well.

Increasing the temperature of the liquid fuel can lower its viscosity, making it easier to convert into small droplets. When fuel is heated, it vaporizes more readily, which aids in creating a fine mist or aerosol. This is especially pertinent for fuels with higher viscosities, such as bunker fuel, which require adequate heating to facilitate effective atomization. As a result, the correct answer is temperature because it enhances the overall atomization process by allowing the liquid to be more easily atomized into small droplets that can mix thoroughly with air, leading to improved combustion efficiency.