Dynamic flow phenomena in a foam application unit

A.B.J. Kroezen, J. Groot Wassink

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    If, during the operation of a foam application unit, a change in the foam production is introduced, the change in the flow becomes noticeable at the point of application onlyafter a certain response delay time. During the operation of the unit it is necessary to take this response delay into consideration. By varying the flow of foam in the application unit, the mass content of foam in the unit is changed as a result of the changed pressure inside the unit. The response delay has been mathematically derived for the flow of agiven type of foam through pipes, as well as through a foam printing unit as a whole. A deviation in the yield of foam on the substrate can be avoided by considering the respons delay caused by a change in the foam production process.
    Original languageEnglish
    Pages (from-to)176-180
    JournalJournal of the Society of Dyers and Colourists
    Issue number4
    Publication statusPublished - 1988


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