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International Heat Transfer Conference 11

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Numerical Analysis of Air Flow and Heat Transfer in Tubular-Blown Film Processing

O. AKAIKE
Department of Mechanical Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku Nagoya 466 JAPAN

Toshihiro Tsuji
Department of Mechanical Engineering, Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Yasutaka Nagano
Nagoya Industrial Science Research Institute; Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Abstract

Numerical simulation of tubular-blown film processing of plastics provides a tool for air-ring designs and suitable polymer properties. Although cooling air plays a key role in its processing ability and film properties, there have been few studies taking correct account of the cooling-air effect. We have performed a numerical analysis of cooling air flow and heat transfer from the surface of molten polymer using turbulence models. We have then simulated a tubular-blown film process under the thermal boundary conditions estimated from the numerical analysis. The film-bubble shape predicted has coincided well with experimental data.

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