TY - JOUR
T1 - Slip effects in viscometric flows of highly filled suspensions
AU - Yilmazer, U.
AU - Kalyon, D. M.
PY - 1989
Y1 - 1989
N2 - In this report, the behavior of a highly filled (60% by volume) suspension in capillary and parallel disk rotational flows was studied, with emphasis on migration and wall slip. Information on pressure as well as drag flows of such highly concentrated suspensions with highly viscous matrices had been lacking. This study is part of a larger study which includes the simulation and experimental studies of the continuous processing of highly filled suspensions in co-rotating twin screw extruders. It is shown the slip velocity at the wall values were determined over three decades of shear stress values. The flow of the suspension studied in this report exhibits shear thinning behavior at low shear stress values measured by parallel disk viscometry. However, at higher shear stress values, the shear viscosity increases with the shear stress, exhibiting rheological dilatancy.
AB - In this report, the behavior of a highly filled (60% by volume) suspension in capillary and parallel disk rotational flows was studied, with emphasis on migration and wall slip. Information on pressure as well as drag flows of such highly concentrated suspensions with highly viscous matrices had been lacking. This study is part of a larger study which includes the simulation and experimental studies of the continuous processing of highly filled suspensions in co-rotating twin screw extruders. It is shown the slip velocity at the wall values were determined over three decades of shear stress values. The flow of the suspension studied in this report exhibits shear thinning behavior at low shear stress values measured by parallel disk viscometry. However, at higher shear stress values, the shear viscosity increases with the shear stress, exhibiting rheological dilatancy.
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M3 - Conference article
AN - SCOPUS:0024862956
SN - 0733-4192
SP - 1682
EP - 1686
JO - Annual Technical Conference - Society of Plastics Engineers
JF - Annual Technical Conference - Society of Plastics Engineers
T2 - ANTEC 89 - 47th Annual Technical Conference of SPE
Y2 - 1 May 1989 through 4 May 1989
ER -