Operability coating window of dual-layer slot coating process using viscocapillary model

Ho Suk Ji; Won Gi Ahn; Ilyoung Kwon; Jaewook Nam; Hyun Wook Jung

doi:10.1016/j.ces.2015.12.016

Operability coating window of dual-layer slot coating process using viscocapillary model

Ho Suk Ji, Won Gi Ahn, Ilyoung Kwon, Jaewook Nam, Hyun Wook Jung

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

The viscocapillary model for predicting the operability windows in a dual-slot coating process for two Newtonian liquids has been derived by means of a lubrication approximation technique from two-dimensional (2-D) Navier-Stokes equations. The flow rates per width and the pressure differences simplified in several sub-regions within the coating bead regime have been integrated together with approximations of the upstream and downstream menisci and the interlayer between the top and bottom layers. Coating limits or onsets for leaking and bead break-up defects have been determined on the basis of the position of upstream meniscus of the bottom layer as an indicator. Operability coating windows predicted from the viscocapillary model show a good agreement with those by 2-D CFD solver and experiments. In addition, the pressure profiles within the coating bead regime compared between the viscocapillary and 2-D models are qualitatively similar. This simplified model can be applied as a fast tool for usefully manipulating the stable operations in dual-layer slot coating systems.

Original language	English
Pages (from-to)	122-129
Number of pages	8
Journal	Chemical Engineering Science
Volume	143
DOIs	https://doi.org/10.1016/j.ces.2015.12.016
Publication status	Published - 2016 Apr 2

Bibliographical note

Funding Information:
This study was supported by research Grant from the Human Resources Development program (No. 20134010200600 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) . J. Nam is grateful for the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (Grant no. NRF-2013R1A1A1004986 ).

Publisher Copyright:
© 2015 Elsevier Ltd.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

Coating bead dynamics
Dual-layer slot coating
Flow rate ratio
Operability coating window
Viscocapillary model
Viscosity ratio

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.ces.2015.12.016

Cite this

@article{1cceb7108bb34d7b82a974a5b264eff7,

title = "Operability coating window of dual-layer slot coating process using viscocapillary model",

abstract = "The viscocapillary model for predicting the operability windows in a dual-slot coating process for two Newtonian liquids has been derived by means of a lubrication approximation technique from two-dimensional (2-D) Navier-Stokes equations. The flow rates per width and the pressure differences simplified in several sub-regions within the coating bead regime have been integrated together with approximations of the upstream and downstream menisci and the interlayer between the top and bottom layers. Coating limits or onsets for leaking and bead break-up defects have been determined on the basis of the position of upstream meniscus of the bottom layer as an indicator. Operability coating windows predicted from the viscocapillary model show a good agreement with those by 2-D CFD solver and experiments. In addition, the pressure profiles within the coating bead regime compared between the viscocapillary and 2-D models are qualitatively similar. This simplified model can be applied as a fast tool for usefully manipulating the stable operations in dual-layer slot coating systems.",

keywords = "Coating bead dynamics, Dual-layer slot coating, Flow rate ratio, Operability coating window, Viscocapillary model, Viscosity ratio",

author = "Ji, {Ho Suk} and Ahn, {Won Gi} and Ilyoung Kwon and Jaewook Nam and Jung, {Hyun Wook}",

note = "Funding Information: This study was supported by research Grant from the Human Resources Development program (No. 20134010200600 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) . J. Nam is grateful for the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (Grant no. NRF-2013R1A1A1004986 ). Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2016",

month = apr,

day = "2",

doi = "10.1016/j.ces.2015.12.016",

language = "English",

volume = "143",

pages = "122--129",

journal = "Chemical Engineering Science",

issn = "0009-2509",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Operability coating window of dual-layer slot coating process using viscocapillary model

AU - Ji, Ho Suk

AU - Ahn, Won Gi

AU - Kwon, Ilyoung

AU - Nam, Jaewook

AU - Jung, Hyun Wook

N1 - Funding Information: This study was supported by research Grant from the Human Resources Development program (No. 20134010200600 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) . J. Nam is grateful for the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (Grant no. NRF-2013R1A1A1004986 ). Publisher Copyright: © 2015 Elsevier Ltd. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2016/4/2

Y1 - 2016/4/2

N2 - The viscocapillary model for predicting the operability windows in a dual-slot coating process for two Newtonian liquids has been derived by means of a lubrication approximation technique from two-dimensional (2-D) Navier-Stokes equations. The flow rates per width and the pressure differences simplified in several sub-regions within the coating bead regime have been integrated together with approximations of the upstream and downstream menisci and the interlayer between the top and bottom layers. Coating limits or onsets for leaking and bead break-up defects have been determined on the basis of the position of upstream meniscus of the bottom layer as an indicator. Operability coating windows predicted from the viscocapillary model show a good agreement with those by 2-D CFD solver and experiments. In addition, the pressure profiles within the coating bead regime compared between the viscocapillary and 2-D models are qualitatively similar. This simplified model can be applied as a fast tool for usefully manipulating the stable operations in dual-layer slot coating systems.

AB - The viscocapillary model for predicting the operability windows in a dual-slot coating process for two Newtonian liquids has been derived by means of a lubrication approximation technique from two-dimensional (2-D) Navier-Stokes equations. The flow rates per width and the pressure differences simplified in several sub-regions within the coating bead regime have been integrated together with approximations of the upstream and downstream menisci and the interlayer between the top and bottom layers. Coating limits or onsets for leaking and bead break-up defects have been determined on the basis of the position of upstream meniscus of the bottom layer as an indicator. Operability coating windows predicted from the viscocapillary model show a good agreement with those by 2-D CFD solver and experiments. In addition, the pressure profiles within the coating bead regime compared between the viscocapillary and 2-D models are qualitatively similar. This simplified model can be applied as a fast tool for usefully manipulating the stable operations in dual-layer slot coating systems.

KW - Coating bead dynamics

KW - Dual-layer slot coating

KW - Flow rate ratio

KW - Operability coating window

KW - Viscocapillary model

KW - Viscosity ratio

UR - http://www.scopus.com/inward/record.url?scp=84954480646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84954480646&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2015.12.016

DO - 10.1016/j.ces.2015.12.016

M3 - Article

AN - SCOPUS:84954480646

SN - 0009-2509

VL - 143

SP - 122

EP - 129

JO - Chemical Engineering Science

JF - Chemical Engineering Science

ER -

Operability coating window of dual-layer slot coating process using viscocapillary model

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this