TY - JOUR
T1 - Nonisothermal extrusion flow of viscoplastic fluids with wall slip
AU - Lawal, Adeniyi
AU - Kalyon, Dilhan M.
PY - 1997/10
Y1 - 1997/10
N2 - The extrusion flow of viscoplastic fluids in shallow channels can be modeled as that occurring between two infinitely long parallel plates, i.e. the generalized plane Couette flow. Commonly encountered viscoplastic fluids including concentrated suspensions exhibit apparent slip in extrusion processing. Various factors, including the roughness of the wall surface, affect wall slip behavior, and the highly viscous nature of the processed materials implies significant viscous dissipation effects. Here, we develop an analytical nonisothermal model of the extrusion of viscoplastic fluids subject to wall slip. The model accommodates different slip coefficients at the screw and barrel surfaces. Closed-form expressions for the velocity and temperature distributions, as well as the bulk temperature valid from the entrance to the exit of the extruder are presented. The conservation of energy equation is solved using the finite integral transform technique. The accuracy of the obtained solutions is established and the effects of various parameters examined.
AB - The extrusion flow of viscoplastic fluids in shallow channels can be modeled as that occurring between two infinitely long parallel plates, i.e. the generalized plane Couette flow. Commonly encountered viscoplastic fluids including concentrated suspensions exhibit apparent slip in extrusion processing. Various factors, including the roughness of the wall surface, affect wall slip behavior, and the highly viscous nature of the processed materials implies significant viscous dissipation effects. Here, we develop an analytical nonisothermal model of the extrusion of viscoplastic fluids subject to wall slip. The model accommodates different slip coefficients at the screw and barrel surfaces. Closed-form expressions for the velocity and temperature distributions, as well as the bulk temperature valid from the entrance to the exit of the extruder are presented. The conservation of energy equation is solved using the finite integral transform technique. The accuracy of the obtained solutions is established and the effects of various parameters examined.
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U2 - 10.1016/S0017-9310(97)00016-1
DO - 10.1016/S0017-9310(97)00016-1
M3 - Article
AN - SCOPUS:0031246564
SN - 0017-9310
VL - 40
SP - 3883
EP - 3897
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 16
ER -