Acoustically induced thermal effects on Rayleigh streaming

The present study focuses on acoustically induced thermal effects Rayleigh streaming inside a resonator. Firstly, we consider the effect of transverse (or wall-normal) mean temperature gradient acoustic flow generated by standing wave between two parallel plates. Analytical expressions for quantities are developed and used to express sources linear streaming. influence variation velocity is clearly identified through term proportional difference square half-width guide. This modifies pattern may generate an additional vortex. On other hand, longitudinal wall-parallel) calculated as cumulated thermoacoustic heat transport in fluid, conduction wall convection air outside At high levels, significantly convected resulting difference. Combining these brings out new criterion parameter nonlinear Reynolds number ( $Re_{NL}$ ) characterizing transition patterns at levels. result explains previous experimental numerical observations dynamics amplitudes, under different boundary conditions, can provide powerful prediction tool transitions.