2002 Volume 2002 Pages 20020009
This report describes a newly developed cascade impacter pollen collection device. We improved on the design of an existing cascade impacter using a numerical simulation method and performed an adhesion experiment using alder pollen. The results are shown to be in close agreement with the results predicted by a numerical analysis based on the Navier-Stokes equation and the Euler-Lagrange method. Based on the Euler-Lagrange method, we analysed the separation of four typical Japanese pollens under various conditions of air suction velocity and nozzle diameter. Pollen grains are collected in four stages of the device. To separate pollens adhered to the same plate, we developed an automatic pollen measuring system, which allowed pollen grains to be completely separated.
