Automatic optical sensor for thickness control of thin transparent films

In the present paper, experiments are reported for the measurement of the complete meniscus profile in asymmetric forward roll coating. A thin laser sheet technique is used to recover accurately the shape and position of the interface for an extensive database of operating conditions. Knowledge of the interface profile and position is then used to measure the total flow rate and its distribution on each cylinder. The results provide for the first time validation of numerical predictions for the extended shape of the meniscus. Comparison with existing theoretical and numerical predictions validates both these approaches, but reveals the need to model the whole flow region, including gravity, instead of restricting to the region downstream of the nip separating the rotating cylinders.

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Meniscus shape experiments in forward roll coating

Decré

Gailly

Buchlin

1995

Physics of Fluids

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Automatic optical sensor for thickness control of thin transparent films

Cited by 1 publication

References 3 publications

Meniscus shape experiments in forward roll coating

Meniscus shape experiments in forward roll coating

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