By J R Backhurst, J H Harker, J.F. Richardson
This quantity within the Coulson and Richardson sequence in chemical engineering comprises complete labored recommendations to the issues posed in quantity 1. when the most quantity includes illustrative labored examples in the course of the textual content, this ebook includes solutions to the more difficult questions posed on the finish of every bankruptcy of the most text.These questions are of either a typical and non-standard nature, and so will end up to be of curiosity to either educational employees instructing classes during this sector and to the willing scholar. Chemical engineers in who're searching for a customary option to a real-life challenge also will locate the e-book of substantial interest.* a useful resource of data for the scholar learning the fabric contained in Chemical Engineering quantity 1* A precious approach to studying - solutions are defined in complete
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95a. 9 A viscous fluid flows through a pipe with slightly porous walls so that there is a leakage of kP, where P is the local pressure measured above the discharge pressure and k is a constant. After a length l, the liquid is discharged into a tank. 5 Assume a fully developed flow with R/ u2 D 8 Re 1 . 15 m diameter to storage tanks situated 100 m away. The pressure drop along the pipe is 70 kN/m2 . The pipeline has to be repaired and it is necessary to pump the liquid by an alternative route consisting of 70 m of 200 mm pipe followed by 50 m of 100 mm pipe.
Taking the first and the last entries in the table, it is seen that when the flowrate increases from 1 ð 10 7 to 1 ð 10 4 m3 /s, that is by a factor of 1000, the pressure difference increases from 1 ð 103 to 1 ð 105 N/m2 that is by a factor of only 100. In this way, the fluid appears to be shear-thinning and the simplest model, the power-law model, will be tried. 5 which is constant over the entire range of the experimental data. 5 Q (m3/s) 10−5 10−6 10−7 103 104 105 106 −∆P (N/m ) 2 Figure 3e.
Water, of viscosity 1 mNs/m2 flowing through the pipe at the same mean velocity gives rise to a pressure drop of 104 N/m2 compared with 105 N/m2 for the non-Newtonian fluid. What is the consistency (“k” value) of the non-Newtonian fluid? 083 P D 104 N/m2 and u D 1 m/s and k D . 39 Two liquids of equal densities, the one Newtonian and the other a non-Newtonian “powerlaw” fluid, flow at equal volumetric rates down two wide vertical surfaces of the same widths. 01 s 1 . 125 times that of the non-Newtonian fluid.