Thermal Effects in Evaporation from Binary Liquid Mixtures

Abstract

Thermal effects are considered assuming a volatile component evaporates from a binary liquid mixture in a very long tube. The work is an extension of the work of Chebbi and Selim (2006) (isothermal case) to include evaporative cooling. A similarity solution is provided for the gas–liquid interface temperature and the temperature profiles in the liquid and gas phases. The analysis accounts for the motion of the gas–liquid interface and shows evaporative cooling as expected. The magnitude of evaporative cooling is found significant when volatility of the volatile component is sufficiently high. The validity of the approximations used in the solution is addressed.

Keywords:

• Binary mixture
• Evaporation
• Evaporative cooling
• Heat transfer
• Similarity solution
• Stefan problem
• Volatile component