Results of numerical analysis show that intensity of convective drying of friable biomass material layer (wood particles, pellets, granules ect.) significantly increases in low frequency pulsing gas (air) flow. In the work are defined physical reasons of draying process intensification in pulsing flow compared with stationary flow. Magnification of frequency of incident flow increases frequency of vortex separation in rear side of cylinder. This causes change of shape of Karmans’s vortex street, changes of pulsing components of aerodynamical forces and intensification of heat exchange process between particle and gas flow. It was investigated pulsations form and impulses frequency influences character on aerodynamical parameters and intensity of cylindrical particles heat exchange. It is proved that in pulsing flow with frequency about 20Hz, intensity of heat exchange between particle and airflow is approximately 30 % higher than in stationary flow.