نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Gas absorption using a falling liquid film is considered an efficient technique in industrial applications, including CO₂ absorption. However, the formation of a concentration boundary layer near the free surface of the film reduces the mass transfer rate and overall process efficiency. In this study, two mass‑transfer enhancement strategies are investigated to mitigate this limitation: an active method based on inducing waves in the liquid film through oscillation of the inlet mass flow rate, and a passive method employing sinusoidal walls. Flow and mass transfer are simulated for tube configurations using an advanced interface‑tracking solver (ALE‑IT). The geometric parameters of the sinusoidal wall include amplitudes ranging from 10% to 50% of the film thickness and wavelengths between 2 and 20 times the film thickness. The results indicate that the active method produces the highest overall absorption. Nevertheless, sinusoidal walls with amplitudes of 20–50% and short wavelengths of 2–5 times the film thickness enhance the average Sherwood number upto 90%-110% of the active method.
کلیدواژهها English
