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The flow of a polymerizing liquid in a cylindrical pipe
Author(s) -
Malkin A. Ya.,
Sherysheva L. I.,
Kulichikhin S. G.,
Zhirkov P. V.
Publication year - 1983
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760231503
Subject(s) - isothermal process , pressure drop , materials science , mechanics , polymerization , work (physics) , isothermal flow , duct (anatomy) , flow (mathematics) , thermodynamics , physics , open channel flow , polymer , composite material , medicine , pathology
This work concerns the flow of a polymerizing liquid (a monomer) in a cylindrical pipe, which simulates the flow‐through reactor. A general formulation of the hydrodynamics of the rheokinetic problem in the non‐isothermal case of flow is given. The problem is solved with account taken of the existence of a radial distribution of velocity, residence time, and degree of conversion in the duct. The shape of the velocity profile undergoes change as the flow moves along the duct: it is originally parabolic (prior to reaction), then becomes strongly extended (at the intermediate stages of the reaction), and finally (upon completion of the reaction) assumes the parabolic shape again. It has been shown that in isothermal or nearly isothermal cases, it is possible to work out sufficiently simple scale‐up laws capable of establishing the dependence of the total degree of conversion and pressure drop on the time of polymerization and the geometric size of the reactor.