Continuous and oscillatory flow properties of concentrated coal/water suspensions

Canadian Journal of Chemical Engineering - Tập 70 Số 1 - Trang 20-27 - 1992
Romano Lapasin1, Sabrina Pricl1
1Istituto di Chimica Applicata e Industriale University of Trieste, via Valerio 2, I-34127 Trieste, Italy

Tóm tắt

AbstractA Theological characterization of coal/water suspensions has been carried out under continuous and oscillatory flow conditions. Shear stress ‐ shear rate data were correlated with the Shangraw‐Grim‐Mattocks (SGM) equation. The analysis of the SGM parameters indicated that a limiting concentration ϕ0 exists above which the suspensions exhibit plastic behavior and suggested that a strong particle aggregation still occurs at high rates of shear. Oscillatory flow tests revealed marked non‐linear viscoelastic properties and analogies were found between the continuous and oscillatory flow behaviors of the coal/water suspensions, particularly under limiting flow conditions.

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Canadian Journal of Chemical Engineering

Tập 70 Số 1

20-27

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