Abstract
ABSTRACTMixer viscometry is an effective means of characterizing fluids containing particulates. an interrupted helical screw impeller used to determine the flow behavior of fresh concrete was scaled‐down to analyze fluid foods with large particulates. the mixer viscometer constant was determined to be 1.6 rad−1 by the matching viscosity method. Large particulate food materials successfully investigated in this study included cream corn, salsa, smooth pasta sauce and chunky pasta sauce.Apparent viscosity curves were constructed from torque and angular velocity data. Testing materials exhibited shear‐thinning behavior and temperature dependence. Analysis revealed K and n values ranging from 10.1 Pa sn to 40.3 Pa sn and 0.17 to 0.36, respectively. Regression control charts, based on apparent viscosity and average shear rate data were constructed for each product. A protocol is presented for producing and utilizing these charts as a statistical quality control tool for industry.
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