Direct Determination of the Flow Curves of Non‐Newtonian Fluids. II. Shearing Rate in the Concentric Cylinder Viscometer

1953 ◽  
Vol 24 (2) ◽  
pp. 134-136 ◽  
Author(s):  
Irvin M. Krieger ◽  
Harold Elrod
Keyword(s):  
Direct Determination ◽  
Newtonian Fluids ◽  
Concentric Cylinder ◽  
Flow Curves ◽  
Shearing Rate ◽  
Cylinder Viscometer

Direct Determination of the Flow Curves of Non‐Newtonian Fluids

1952 ◽  
Vol 23 (12) ◽  
pp. 1412-1412 ◽  
Author(s):  
Irvin M. Krieger ◽  
Samuel H. Maron
Keyword(s):  
Direct Determination ◽  
Newtonian Fluids ◽  
Flow Curves

Direct Determination of the Flow Curves of Non‐Newtonian Fluids

1952 ◽  
Vol 23 (1) ◽  
pp. 147-149 ◽  
Author(s):  
Irvin M. Krieger ◽  
Samuel H. Maron
Keyword(s):  
Direct Determination ◽  
Newtonian Fluids ◽  
Flow Curves

scholarly journals Concentric cylinder viscometer flows of Herschel-Bulkley fluids

2019 ◽  
Vol 29 (1) ◽  
pp. 173-181 ◽  
Author(s):  
Hans Joakim Skadsem ◽  
Arild Saasen
Keyword(s):  
Shear Rate ◽  
Yield Stress ◽  
Couette Flow ◽  
Newtonian Fluid ◽  
Shear Thinning ◽  
Newtonian Fluids ◽  
Drilling Fluids ◽  
Concentric Cylinder ◽  
Shear Thinning Fluids ◽  
Cylinder Viscometer

Abstract Drilling fluids and well cements are example non-Newtonian fluids that are used for geothermal and petroleum well construction. Measurement of the non-Newtonian fluid viscosities are normally performed using a concentric cylinder Couette geometry, where one of the cylinders rotates at a controlled speed or under a controlled torque. In this paper we address Couette flow of yield stress shear thinning fluids in concentric cylinder geometries.We focus on typical oilfield viscometers and discuss effects of yield stress and shear thinning on fluid yielding at low viscometer rotational speeds and errors caused by the Newtonian shear rate assumption. We relate these errors to possible implications for typical wellbore flows.

The Direct Determination of I131 in Heterogeneous Fecal Specimens

1961 ◽  
Vol 41 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Arthur F. Dratz ◽  
James C. Coberly
Keyword(s):  
Direct Determination
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