Roll-over-web coating of pseudoplastic and viscoplastic sheets using the lubrication approximation

δείτε την πρωτότυπη σελίδα τεκμηρίου
στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*



Roll-over-web coating of pseudoplastic and viscoplastic sheets using the lubrication approximation (EN)

Mitsoulis, E (EN)
Sofou, S (EN)

journalArticle (EN)

2014-03-01T01:23:02Z
2005 (EN)


The Lubrication Approximation Theory (LAT) is used to provide numerical results in roll coating over a moving flat web. The Herschel-Bulkley model of viscoplasticity is used, which reduces with appropriate modifications to the Bingham, power-law, and Newtonian models. Results are obtained for such quantities as coating thickness, separation point, and the volumetric flow rate required for various values of the power-law index (in the case of pseudoplasticity) and of the Bingham number (in the case of viscoplasticity). All these values increase substantially with the increasing non-Newtonian character of the fluid. Yielded and unyielded areas are quantitatively shown for several cases of viscoplasticity. Pressure gradient and pressure distributions are given for all cases. Integrated quantities of engineering interest are also calculated. These include the maximum pressure, the roll/sheet separating force, and the power input to the roll. These quantities increase substantially and monotonically in a dimensionless form, as the power-law index decreases or the Bingham number increases. © 2005 SAGE Publications. (EN)

Materials Science, Coatings & Films (EN)

Viscoplastic sheets (EN)
Herschel-Bulkley model (EN)
Roll-over-web coating (EN)
Plastic sheets (EN)
Yield line (EN)
Pseudoplasticity (EN)
Pseudoplastic sheets (EN)
Viscoplasticity (EN)
Approximation theory (EN)
Mathematical models (EN)
Lubrication (EN)
Yield stress (EN)
Plastic coatings (EN)

Journal of Plastic Film and Sheeting (EN)

Αγγλική γλώσσα

SAGE PUBLICATIONS LTD (EN)




*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.