By J R Backhurst, J H Harker, J. F. Richardson
This quantity within the Coulson and Richardson sequence in chemical engineering comprises complete labored options to the issues posed in quantity 1. when the most quantity includes illustrative labored examples during the textual content, this e-book comprises solutions to the more difficult questions posed on the finish of every bankruptcy of the most text.
those questions are of either a typical and non-standard nature, and so will turn out to be of curiosity to either educational employees instructing classes during this region and to the prepared pupil. Chemical engineers in who're trying to find a typical method to a real-life challenge also will locate the e-book of substantial curiosity.
* a useful resource of knowledge for the coed learning the fabric contained in Chemical Engineering quantity 1
* A invaluable approach to studying - solutions are defined in complete
Read Online or Download Chemical Engineering: Solutions to the Problems in Volume 1 PDF
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Extra info for Chemical Engineering: Solutions to the Problems in Volume 1
I A force balance over the annular core where y > r0 gives: 1P y 2 D 2 yLRy Hence: Ry D yRw /r and y D rRy /Rw (ii) when: Ry D RY and r0 D rRY /Rw (iii) RY D Ry k dux /dy dux Ry RY 1 D D dy k k ∴ from equation (ii): kux D y 2 Rw /2r Integrating: When y D r, ux D 0, C D (iv) RY RY y C C rRw /2 C RY r. 18 2 Oil of viscosity 10 mN s/m and density 950 kg/m3 is pumped 8 km from an oil reﬁnery to a distribution depot through a 75 mm diameter pipeline and is then despatched to customers at a rate of 500 tonne/day.
26 Water (density 1000 kg/m3 , viscosity 1 mNs/m2 ) is pumped through a 50 mm diameter pipeline at 4 kg/s and the pressure drop is 1 MN/m2 . What will be the pressure drop for a solution of glycerol in water (density 1050 kg/m3 , viscosity 10 mNs/m2 ) when pumped at the same rate? Assume the pipe to be smooth. 04 m/s. 05/1 ð 10 3 D 102,000 From Fig. 05/1 ð 10 From Fig. 042 D 1293l. 27 A liquid is pumped in streamline ﬂow through a pipe of diameter d. At what distance from the centre of the pipe will the ﬂuid be ﬂowing at the average velocity?
5 ð 10 1 ð 10 7 7 6 6 6 5 4 Suggest a suitable model to describe the ﬂuid properties. Solution Inspection of the data shows that the pressure difference increases less rapidly than the ﬂowrate. 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.