Coconut milk was extracted from fresh coconut flesh. The rheological behavior of coconut milk containing 30% fat was studied and found to obey the power law. Table 1shows the consistency coefficient (k) and flow behavior index (n) values obtained at different temperatures (data taken from Simuang, Chiewchan, & Tansakul, 2004). Table 1: Consistency Coefficient and Flow Behavior Index of Coconut Milk for Different Temperatures Temperature (C) K (Pa.sn) n 25 5.05 x 10-2 0.851 70 4.38 x 10-2 0.739 80 3.80 x 10-2 0.756 90 3.49 x 10-2 0.758 a. Calculate the Arrhenius parameters for the effect of temperature on the apparent viscosity of the coconut milk sample at a shear rate of 300 s−1 b. Comment on: (i) the significance of the n values (ii) the effect of temperature on the flow behavior of coconut milk.
Coconut milk was extracted from fresh coconut flesh. The rheological behavior of coconut milk containing 30% fat was studied and found to obey the power law. Table 1shows the consistency coefficient (k) and flow behavior index (n) values obtained at different temperatures (data taken from Simuang, Chiewchan, & Tansakul, 2004). Table 1: Consistency Coefficient and Flow Behavior Index of Coconut Milk for Different Temperatures Temperature (C) K (Pa.sn) n 25 5.05 x 10-2 0.851 70 4.38 x 10-2 0.739 80 3.80 x 10-2 0.756 90 3.49 x 10-2 0.758 a. Calculate the Arrhenius parameters for the effect of temperature on the apparent viscosity of the coconut milk sample at a shear rate of 300 s−1 b. Comment on: (i) the significance of the n values (ii) the effect of temperature on the flow behavior of coconut milk.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Coconut milk was extracted from fresh coconut flesh. The rheological behavior of coconut milk containing 30% fat was studied and found to obey the power law. Table 1shows the consistency coefficient (k) and flow behavior index (n) values obtained at different temperatures (data taken from Simuang, Chiewchan, & Tansakul, 2004).
Table 1: Consistency Coefficient and Flow Behavior Index of Coconut Milk for Different Temperatures
|
Temperature (C) |
K (Pa.sn) |
n |
|
25 |
5.05 x 10-2 |
0.851 |
|
70 |
4.38 x 10-2 |
0.739 |
|
80 |
3.80 x 10-2 |
0.756 |
|
90 |
3.49 x 10-2 |
0.758 |
a. Calculate the Arrhenius parameters for the effect of temperature on the apparent viscosity of the coconut milk sample at a shear rate of 300 s−1
b. Comment on:
(i) the significance of the n values
(ii) the effect of temperature on the flow behavior of coconut milk.
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