Numerical Simulation of Air Entrainment Between Web and Spirally Grooved Roller Using Fluid-Structure Interaction Models

Abstract

This paper presents numerical quasi-static simulation results of air entrainment phenomenon between a web and a spirally grooved roller. The numerical result shows that during one circle rotation of spirally grooved roller, traction coefficient between the web and roller is changed according to time due to changing shape of groove in contact region and average traction coefficient of spirally grooved roller is higher than circumferential grooved roller. Using laser sensor, web deflection is measured and compared with the numerical results of web deflection at the entrance region. Furthermore, smoke wire experiment shows a clear view of air entrainment phenomenon at the entrance region between the web and roller.