Experimental study of the secondary structures over the local heat source in the axisymmetric case
Formation of secondary flows in a cylindrical fluid layer with local heating was studied in a laboratory experiment. It was shown that secondary structures appears in a temperature boundary layer. The shape of secondary flows essentially depends on the heating. The set of frequencies characterizing the secondary flows generation was obtained by thermocouple measurements. Temperature time series were analyzed by wavelet-analyses for fixed locations over the heater. Azimuthal dependence of frequency of temperature fluctuations and its time inhomogeneity was shown.