View in EDS

Non-isothermal analysis of calendering using couple stress fluid.

Saved in:
Bibliographic Details
Title: Non-isothermal analysis of calendering using couple stress fluid.
Authors: Ali, Nasir1, Javed, Muhammad Asif2, Atif, Hafiz Muhammad1 rana_asif_iiui@yahoo.com
Source: Journal of Plastic Film & Sheeting. Oct2018, Vol. 34 Issue 4, p358-381. 24p.
Abstract: The non-isothermal flow inside a calender is modeled and analyzed for a couple stress fluid. The governing flow equations are developed using conservation laws of mass, momentum and energy. An order of magnitude analysis is performed and leading terms in momentum and energy equations are retained. The reduced momentum equation is solved to obtain the exact expression for velocity and pressure gradient. The reduced energy equation is solved numerically using a hybrid numerical method. The significant effects of the involved parameters on the pressure, pressure gradient velocity profile, roll-separating force, power input, exiting sheet thickness and temperature are examined through various plots. The pressure inside the calender significantly increases with increased couple stress effects. For larger couple stress parameters, the power function and roll-separating function show steady state behavior. The two maxima are distinctly observed in temperature distribution near the roll surfaces for small couple stress effects (γ→∞). In contrast, the temperature achieves maximum at center for strong couple stress effects (γ→0). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Plastic Film & Sheeting is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:The non-isothermal flow inside a calender is modeled and analyzed for a couple stress fluid. The governing flow equations are developed using conservation laws of mass, momentum and energy. An order of magnitude analysis is performed and leading terms in momentum and energy equations are retained. The reduced momentum equation is solved to obtain the exact expression for velocity and pressure gradient. The reduced energy equation is solved numerically using a hybrid numerical method. The significant effects of the involved parameters on the pressure, pressure gradient velocity profile, roll-separating force, power input, exiting sheet thickness and temperature are examined through various plots. The pressure inside the calender significantly increases with increased couple stress effects. For larger couple stress parameters, the power function and roll-separating function show steady state behavior. The two maxima are distinctly observed in temperature distribution near the roll surfaces for small couple stress effects (γ→∞). In contrast, the temperature achieves maximum at center for strong couple stress effects (γ→0). [ABSTRACT FROM AUTHOR]
ISSN:87560879
DOI:10.1177/8756087917746454