Transient responses of two-dimensional viscoelastic film casting processes to sinusoidal disturbances

Seung Won Choi; Dong Myeong Shin; Joo Sung Lee; Ju Min Kim; Hyun Wook Jung; Jae Chun Hyun

doi:10.1007/s11814-009-0005-1

Transient responses of two-dimensional viscoelastic film casting processes to sinusoidal disturbances

Seung Won Choi, Dong Myeong Shin, Joo Sung Lee, Ju Min Kim, Hyun Wook Jung, Jae Chun Hyun

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

6 Citations (Scopus)

Abstract

The sensitivity of two-dimensional isothermal film casting processes to ongoing sinusoidal disturbances has been investigated by using the frequency response method with transient simulation techniques. Amplitude ratios of state variables such as cross-sectional area, film width and film thickness at the take-up position with respect to a sinusoidal disturbance show resonant peaks along the frequency domain. Effects of operating conditions, such as drawdown ratio and aspect ratio, on the process sensitivity have been examined. Increasing drawdown ratio and decreasing aspect ratio make the system more sensitive to disturbances. Also, the dichotomous behavior in the sensitivity analysis using viscoelastic Phan-Thien and Tanner fluids has been elucidated. This frequency response method can be a useful tool to optimally design process systems for better processability and product quality.

Original language	English
Pages (from-to)	26-31
Number of pages	6
Journal	Korean Journal of Chemical Engineering
Volume	26
Issue number	1
DOIs	https://doi.org/10.1007/s11814-009-0005-1
Publication status	Published - 2009 Jan

Bibliographical note

Funding Information:
This study was supported by research grants from the Korea University and the Seoul R&BD program. Also, the support of the KOSEF (R01-2008-000-11701-0) is gratefully acknowledged.

Keywords

Film casting
Frequency response
Sensitivity
Sinusoidal disturbance
Transient simulation

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1007/s11814-009-0005-1

Cite this

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title = "Transient responses of two-dimensional viscoelastic film casting processes to sinusoidal disturbances",

abstract = "The sensitivity of two-dimensional isothermal film casting processes to ongoing sinusoidal disturbances has been investigated by using the frequency response method with transient simulation techniques. Amplitude ratios of state variables such as cross-sectional area, film width and film thickness at the take-up position with respect to a sinusoidal disturbance show resonant peaks along the frequency domain. Effects of operating conditions, such as drawdown ratio and aspect ratio, on the process sensitivity have been examined. Increasing drawdown ratio and decreasing aspect ratio make the system more sensitive to disturbances. Also, the dichotomous behavior in the sensitivity analysis using viscoelastic Phan-Thien and Tanner fluids has been elucidated. This frequency response method can be a useful tool to optimally design process systems for better processability and product quality.",

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note = "Funding Information: This study was supported by research grants from the Korea University and the Seoul R&BD program. Also, the support of the KOSEF (R01-2008-000-11701-0) is gratefully acknowledged.",

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doi = "10.1007/s11814-009-0005-1",

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AU - Shin, Dong Myeong

AU - Lee, Joo Sung

AU - Kim, Ju Min

AU - Jung, Hyun Wook

AU - Hyun, Jae Chun

N1 - Funding Information: This study was supported by research grants from the Korea University and the Seoul R&BD program. Also, the support of the KOSEF (R01-2008-000-11701-0) is gratefully acknowledged.

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N2 - The sensitivity of two-dimensional isothermal film casting processes to ongoing sinusoidal disturbances has been investigated by using the frequency response method with transient simulation techniques. Amplitude ratios of state variables such as cross-sectional area, film width and film thickness at the take-up position with respect to a sinusoidal disturbance show resonant peaks along the frequency domain. Effects of operating conditions, such as drawdown ratio and aspect ratio, on the process sensitivity have been examined. Increasing drawdown ratio and decreasing aspect ratio make the system more sensitive to disturbances. Also, the dichotomous behavior in the sensitivity analysis using viscoelastic Phan-Thien and Tanner fluids has been elucidated. This frequency response method can be a useful tool to optimally design process systems for better processability and product quality.

AB - The sensitivity of two-dimensional isothermal film casting processes to ongoing sinusoidal disturbances has been investigated by using the frequency response method with transient simulation techniques. Amplitude ratios of state variables such as cross-sectional area, film width and film thickness at the take-up position with respect to a sinusoidal disturbance show resonant peaks along the frequency domain. Effects of operating conditions, such as drawdown ratio and aspect ratio, on the process sensitivity have been examined. Increasing drawdown ratio and decreasing aspect ratio make the system more sensitive to disturbances. Also, the dichotomous behavior in the sensitivity analysis using viscoelastic Phan-Thien and Tanner fluids has been elucidated. This frequency response method can be a useful tool to optimally design process systems for better processability and product quality.

KW - Film casting

KW - Frequency response

KW - Sensitivity

KW - Sinusoidal disturbance

KW - Transient simulation

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Transient responses of two-dimensional viscoelastic film casting processes to sinusoidal disturbances

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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