301 柔軟媒体搬送時におけるウェブ・ローラ間の流体力学的挙動(G05-5 複雑流れ(1),G05 流体工学)  [in Japanese] 301 Fluid Dynamics Behavior between Web and Roller in Transporting Flexible Media  [in Japanese]

The flexible continuous materials like a newsprint, film, Magnetic tape, etc. are called web, and the control of the air film thickness in web-handling is an important technology. The measurements of pressure distribution at roller surface and air film thickness were done by using the impermeable web (PET film). In the pressure measurement, the rotation roller speed have been changed. In addition, visualization in the entrance area and the exit area was done, the PIV method was used and analyzed. As results of the experiment, the pressure of the spike shape was shown in the vicinity of the exit. Moreover, from the result of visualization, the vortex occurred in the entrance area, and the flow toward the upstream was able to be observed in the exit area. The generation mechanism of the pressure spike was able to be guessed from these.