Analysis of evaporation in the presence of composition/temperature gradient induced natural convection

✍ Scribed by Shou-Shing Hsieh; Nan-Huei Kuo

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 875 KB
• Volume: 36
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(05)80293-5

✦ Synopsis

A numerical analysis is performed to investigate the effects of the presence of combined composition and temperature gradient induccd natural convection for evaporation from an open-topped tube which is partially filled with a liquid. Numerical solutions were carried out for water as the evaporation vapor and air as the gas. The present numerical results obtained at Gr r = l04 and GrL = 105 with Gr~ = 10 ", 105 and 106, respectively, for a completely dry case (i.e. ~b = 0) and a relatively humid case (i.e. q~ = 90%). Results were presented in terms of streamlines and isotherms as well as isohaline distributions. Numerical data show that there is no definite distribution among these three distributions as GrM is increased.

However, the change seems to follow a definite trend and it is reasonable.