Abstract
A new method for recovery of non-Newtonian pastes from a pipe-line has been presented for the special case of two-phase flow of gas and liquid in a horizontal pipe. If conditions in which two-phase slug flow occurs are created a significant recovery of liquid is possible.On the basis of a modification of the Dukler-Taitel flow pattern map for two-phase flow of gas and Newtonian liquid a method for evaluation of the conditions in which slug flow of gas and non-Newtonian paste occurs was proposed.The efficiency of a non-Newtonian past recovery was checked experimentally. As experimental media typical food pastes: fruit jam, tomato concentrate, cacao glazing, and mayonnaise were used. The thickness of the paste layer remaining in the pipe was dependent on the two-phase flow regime. For all experimental media the highest degree of paste recovery, about 75%, was obtained in the range of slug flow. The correlation equation enabling prediction of the layer thickness of paste remaining on the pipe wall is also presented.Key wordsNon-Newtonian liquidpipe flowtwo-phase flowfood rheology
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