Logarithmically slow expansion of hot bubbles in gases

We predict a logarithmically slow expansion of hot bubbles in gases in the process of cooling. A model problem is first solved, when the temperature h as compact support. Then the temperature profile decaying exponentially at large distances is considered. The periphery of the bubble is shown to rema in essentially static ("glassy'') in the process of cooling until it is tak en over by a logarithmically slowly expanding "core." An analytical solutio n to the problem is obtained by matched asymptotic expansion. This problem gives an example of how logarithmic corrections enter dynamic scaling.