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Beschreibung
This book provides an important insight into the phenomena of air entrainment that occurs during almost all coating operations especially those that involve thin liquid film coating. The data presented on air entrainment speeds show that one cannot consider molecular effects only to describe dynamic wetting. Hydrodynamic effects of substrate roughness and air pressure play a major role and significantly affect air entrainment speed. In this book, previously conflicting effects (as predicted by the maximum speed of wetting concept and previous experimental data) of substrate roughness on air entrainment speed are reconciled. The data obtained in this research show that roughness can increase or decrease air entrainment velocity depending on the value of roughness and viscosity. This is an important result which can be exploited in industrial applications to coat viscous fluids (high solid content) at high speeds. The most important and novel aspect of this research is the experimental programme under vacuum, which demonstrates the striking effect of air pressure (viscosity) on air entrainment speed that increases exponentially as the pressure is reduced.
This book provides an important insight into the phenomena of air entrainment that occurs during almost all coating operations especially those that involve thin liquid film coating. The data presented on air entrainment speeds show that one cannot consider molecular effects only to describe dynamic wetting. Hydrodynamic effects of substrate roughness and air pressure play a major role and significantly affect air entrainment speed. In this book, previously conflicting effects (as predicted by the maximum speed of wetting concept and previous experimental data) of substrate roughness on air entrainment speed are reconciled. The data obtained in this research show that roughness can increase or decrease air entrainment velocity depending on the value of roughness and viscosity. This is an important result which can be exploited in industrial applications to coat viscous fluids (high solid content) at high speeds. The most important and novel aspect of this research is the experimental programme under vacuum, which demonstrates the striking effect of air pressure (viscosity) on air entrainment speed that increases exponentially as the pressure is reduced.
Über den Autor
Dr. Mohammad Ilyas Khan studied his Bachelor of Engineering degree in Chemical Engineering and his PhD from the same department at the University of Bradford. His research is focused on wettability and air bubbles entrainment velocity in thin liquid film coatings operations. The author has almost 10 years of experience in academia.
Details
Erscheinungsjahr: 2017
Fachbereich: Fertigungstechnik
Genre: Mathematik, Medizin, Naturwissenschaften, Technik
Rubrik: Naturwissenschaften & Technik
Medium: Taschenbuch
Inhalt: 176 S.
ISBN-13: 9783659924149
ISBN-10: 3659924148
Sprache: Englisch
Einband: Kartoniert / Broschiert
Autor: Khan, Mohammad Ilyas
Hersteller: LAP LAMBERT Academic Publishing
Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, D-22848 Norderstedt, info@bod.de
Maße: 220 x 150 x 12 mm
Von/Mit: Mohammad Ilyas Khan
Erscheinungsdatum: 26.01.2017
Gewicht: 0,28 kg
Artikel-ID: 108443926

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