Transient heat and mass transfer in the two-phase system: Subliming solid-vapour-gas mixture

✍ Scribed by J. Smolík; J. Vítovec

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 446 KB
• Volume: 26
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(83)80122-7

✦ Synopsis

Tra~sient ~eat and mass transfer in the two-phase system consisting of a subliming solid and a vapour-gas ml~ture IS analysed. The aim of the work is to determine the temperature of the sublimation surface of a ~ohd sub~tance, ~vaporated from a plate into a layer of inert gas for the case when the plate temper~t~re IS a function of time. T~e mathematical description of the system is verified experimentally by determining the temperature profiles m a layer ofsolid naphthalene in a naphthalene-helium system. The good agreem~nt found between the calculated and measured temperature profiles justifies the approximations used and verifies the results of an earlier analysis of unsteady state heat and mass transfer in the thermal diffusion cloud chamber. I\O:\IEI\CLATURE Ave'AeV' constant in the Wassiljewa equation; C p , heat capacity at constant pressure; C v ' heat capacity at constant volume; c, mole concentration; D ve' coefficient of binary diffusion, D~eRT'+ liP; e, energy flux relative to mass average velocity; H, enthalpy; h, height of vapour-gas layer; J,