Abstract
The behavior ofbreathing i pollen was studied by numerical calculations and measurements with a phantom model. The preliminary experiments were carried out by using 2-D cylindrical model to confirm the validity of the present numerical calculation method. The velocity profiles around Ihe nose of the phantom model were optically measured and numerically calculated. The influence of the suction air velocity through the phantom nostril is cleared by this measurements and calculations, when the phantom model breathes in (pollen) particles. The rate of the (pollen) particles in suction air into the nostril is influenced by this suction air velocity. This rate increases as the suction air velocity is faster, but this rilte is nearly constant in more than die suction air velocity Vs=1.Om/s.
