<p>This study examines the outcomes of double droplet impact on a liquid film with different thicknesses and temperatures placed on a flat solid surface. Through numerical simulations, we investigate the temporal dynamics of the crown structure, with a focus on the influence of liquid film thickness and temperature. Our results show that as the liquid film thickness increases, the crown filament jet size increases, leading to jet breakup and the formation of secondary drops. However, higher film temperatures reduce or delay the breakup of the jet, especially for thicker films. For a fixed temperature, an increase in film thickness causes to a reduction in liquid ligament size, leading to the formation of secondary drops. In contrast, increasing the film temperature for a fixed thickness not only reduces liquid ligaments size but also inhibits secondary drop formation. These findings enhance the understanding of double droplet impact dynamics and provide insights into controlling secondary droplet formation, with potential applications in coating processes, spray cooling, and other fluid dynamics systems.</p>