Statistical method to evaluate the critical Reynolds number for pseudoplastic fluids in tubes

Danilo T. Campos, James F. Steffe, Robert Y. Ofoli

    Research output: Research - peer-reviewArticle

    • 5 Citations

    Abstract

    An experimental, non-intrusive tube system with appropriate instrumentation for measuring pressure drop and mass flow rate was developed to investigate the departure from laminar flow of pseudoplastic fluids (aqueous solutions of sodium carboxymethylcellulose). A critical Reynolds number was selected to correspond to the intersection of the two lines joining the laminar and turbulent flow data on the pressure drop versus Reynolds number plots. The standard deviation of pressure drop increased at these critical points. Results also indicated large spikes at these points in the plots of variance ratio of pressure drop versus the critical Reynolds number. This phenomenon could form the statistical basis for establishing the departure from laminar flow. In the laminar region, standard deviations were low, suggesting calm, stable flow of the fluids, a well known characteristic of laminar flow.

    LanguageEnglish (US)
    Pages21-32
    Number of pages12
    JournalJournal of Food Engineering
    Volume23
    Issue number1
    DOIs
    StatePublished - 1994

    Profile

    laminar flow
    statistical analysis
    Reynolds number
    fluids
    Pressure
    turbulent flow
    mass flow
    carboxymethylcellulose
    instrumentation
    aqueous solutions
    sodium
    Carboxymethylcellulose Sodium

    ASJC Scopus subject areas

    • Food Science

    Cite this

    Statistical method to evaluate the critical Reynolds number for pseudoplastic fluids in tubes. / Campos, Danilo T.; Steffe, James F.; Ofoli, Robert Y.

    In: Journal of Food Engineering, Vol. 23, No. 1, 1994, p. 21-32.

    Research output: Research - peer-reviewArticle

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