Thermal stability of a hot inert gas bubble in a cool reactive liquid

✍ Scribed by M.B. Zaturska; J. Adler

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 604 KB
• Volume: 13
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(69)90022-4

✦ Synopsis

The behaviour of a hot inert gas bubble in an infinite sea of cool reactive liquid has been investigated utilizing a temperature-profile method of Spalding. 'Inner solutions', valid for small values of the time, have been found by singular perturbatiLl methods for (i) an initial stepped temperature distribution and (ii) a hot gas bubble surrounded by a thc~mal layer. These have been taken to represent two extreme physical situations, instantaneous contact of the bubble with the liquid and the initial heating of the bubble and surrounding liquid by adiabatic compression. It has been shown that the early stages of the process in (i) are characterized by a rapid fall in temperature, with the bubble Jolume remaining approximately constant and chemical reaction playing no part. For (ii) the bubble temperature and volume initially increase, and this represents a supercritical situation which finally leads to thermal explosion.

* Based on Chapter 5 of the Ph.D. Thesis i1967) of London University by M. B. Zaturska.