| Abstract: | The temperature and temperature fluctuations, the  thermal intermittency, and the fluctuation spectra of the velocity and temperature are measured in the wake behind a linear heat source (a heated wire whose diameter is much smaller than the turbulence scale of the incident flow). A self-similar solution for the far region of the wake is found numerically and the initial non-self-similar part of the wake is calculated taking into account rheological effects and the experimentally observed enhanced dissipation.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 4, pp. 39–45, July–August, 1978.The authors are indebted to V. R. Kuznetsov for help in solving the self-similar problem, to I. P. Smirnova for writing the program for calculating the non-self-similar flow, and to V. N. Novikov for help with the experiments. |
