The liquid film thickness plays a crucial role in various engineering for heat and mass transfer applications. Dynamic studies are required to evaluate experimental performance and optimize operating conditions based on flow rate, longitudinal variation, temperature, and surface modification. This study used dynamic film thickness measurement on an inclined plate with and without surface modification. The inclined plate was layered with copper metal foam having 50 PPI and a thickness of 0.1 cm. The film thickness characteristic over the inclined plate was studied dynamically with respect to time, it was observed that for a higher flow rate, the film thickness fluctuations were higher compared to a lower range of flow. While the effect of flow rate ranging from 0.4 to 1.8 lpm on film thickness was examined, the film thickness increases with an increase in flow rate. The metal foam used in this study resulted in tortuous flow, detachment, and reattachment of the boundary layer, leading to better intermixing. The film thickness variation along the length of the plate with distances ranging from 0–20 cm was plotted. It was found that the film thickness increased up to 5 cm along the length of the plain inclined plate and up to 10 cm for the metal foam layered inclined plate. The copper metal foam gave uniform spreading on the surface, enabling it to operate at a lower flow rate than a plain inclined surface.