A Numerical Study on Air-Entrainment between a Web and a Convex Guide Roller in a Web Transportation Process

Puttha Jeenkour

doi:10.4028/www.scientific.net/AMM.392.110

Paper Titles

A New Analytical Expression of Overall Collision Efficiency for the Water Droplet Impinging on a Cylinder
p.90

Balanced Ventilation Principle in the Application of Shigetai Coal Mine Ventilation System Optimization
p.95

Numerical Solution of Multidimensional Compressible Flow by High Order Nodal Discontinuous Galerkin Method
p.100

Numerical Investigation of Adhesively Bonded Joints
p.105

A Numerical Study on Air-Entrainment between a Web and a Convex Guide Roller in a Web Transportation Process
p.110

A Study on the New Portable Effervescent Atomized Water Mist Equipment
p.116

Dynamic Response Analysis of NC Machine Tool's Bed on ANSYS
p.122

Trajectory Compensation of Chute Constrained Chain Drive
p.127

Numerical Analysis on Two-Phase Integration of Sludge Thickening and Digestion Reactor Flow Field
p.131

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 392A Numerical Study on Air-Entrainment between a Web...

A Numerical Study on Air-Entrainment between a Web and a Convex Guide Roller in a Web Transportation Process

Abstract:

This paper presents a characteristic of air-entrainment between a web and a guide roller with modified convex shape. Air film thickness is derived using the modified Reynolds equation, a roller shape equation, and a web deflection equation. A finite difference method and a Newton-Raphson scheme are employed to achieve numerical results, i.e. air film thickness and air pressure distribution profiles, a minimum air film thickness, and an air film thickness at the middle of roller length under varied convex roller shapes. The results show that both minimum and central air film thicknesses decrease when the roller is designed as convex shape, and a parameter of convex roller shape affects a minimum air film thickness position.