The mechanisms of thermal diffusion and baro-diffusion effects on thermacoustic mixture separation

▸ A new numerical method has been developed to study thermacoustic separation. ▸ The difference between the numerical and experimental values is no more than 5.8%. ▸ It is shown that only the radial gradient can cause separation of the mixture. ▸ Thermal diffusion performs as main driving force of thermoacoustic separation. ▸ The detailed process of thermoacoustic mixture separation is revealed.