Question

35.7 17.5 8.56 4.19 2.05 1.00 3.49 2.51 1.78 1.22 0.80 0.488 2. The following shear stress and shcar rate data for three different fluids were mcasured in a laboratory i) Standard Oil VISC. No. 2-600-68-1h Shear Rate (sec-1) Shear Stress (Dynecm 84.8 42.6 26.5 8.48 2.65 0.848 0.265 0.0848 1610 193 57.7 50.9 16.42 5.26 1808 Given the data above, determine for each fluid i, i, and ili a) The type of fluid (Newtonian, Non-Newtonian, RscudaplasticDilatant, etc.) b) The power-law indices (K and n using the Ostwald-de Waclc (Power Law) Model c) The viscosity (one of these may be a function of the shear rate) d) If any of the three is a Non-Newtonian fluid, please also plot the viscosity as a ii) Pure Glycerol Shear Rate (see) Shear Stress (Dyne/en 9.23 9.23 5.75 3.68 1.464 253.5 126.7 124.8 78 49.7 20.25 function of shear rate. iii) TORP Gel Shear Rat (see)Shear Stress (Pa) 0.998 2.05 4.18 8.56 17.5 35.8 73.3 150.0 73.4 0.490 0.788 1.21 3.48 4.85 6.89 4.90

Answer 1

Newtonian fluid

K = 19

n =1

K = viscosity

Newtonian

K = 13.73

n =1

K = viscosity

Non newtonian (pseudo plastic)