The following shear/stress-rate behavior was observed. Shear Rate (seconds -1) Shear Stress (dynes/cm2) 20 30 40...

 

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The following shear/stress-rate behavior was observed. Shear Rate (seconds -1) Shear Stress (dynes/cm2) 20 30 40 50 11.0 15.2 19.1 22.9 60 26.5 a. Make a plot of shear stress (ordinate) vs. shear rate (abscissa) on Cartesian paper. Make a plot of shear stress (ordinate) vs. shear rate (abscissa) on log-log paper. b. Can the fluid behavior be accurately modeled by the Newtonian, Bingham plastic, or power-law model? c. Compute the apparent viscosity for each shear rate. Answer: 55 cp at 20 seconds, d. Cumpute the yield point and plastic viscosity using data taken at shear rates of 20 and 60 seconds ср. Answer: Ty 3.3 dynes/cm2; up =39 The following shear/stress-rate behavior was observed. Shear Rate (seconds -1) Shear Stress (dynes/cm2) 20 30 40 50 11.0 15.2 19.1 22.9 60 26.5 a. Make a plot of shear stress (ordinate) vs. shear rate (abscissa) on Cartesian paper. Make a plot of shear stress (ordinate) vs. shear rate (abscissa) on log-log paper. b. Can the fluid behavior be accurately modeled by the Newtonian, Bingham plastic, or power-law model? c. Compute the apparent viscosity for each shear rate. Answer: 55 cp at 20 seconds, d. Cumpute the yield point and plastic viscosity using data taken at shear rates of 20 and 60 seconds ср. Answer: Ty 3.3 dynes/cm2; up =39

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