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 booklet includes solutions to the more difficult questions posed on the finish of every bankruptcy of the most text.
those questions are of either a regular and non-standard nature, and so will end up to be of curiosity to either educational employees instructing classes during this zone and to the prepared scholar. Chemical engineers in who're trying to find a customary strategy to a real-life challenge also will locate the booklet of substantial curiosity.
* a useful resource of data for the scholar learning the fabric contained in Chemical Engineering quantity 1
* A necessary approach to studying - solutions are defined in complete
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Additional info for Chemical engineering. Solutions to the problems in chemical engineering
5 mm, what is the pressure drop? 02 Ns/m2 ? 04 m/s. 001 and from Fig. 6 ð 106 From Fig. 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.
5 For a fluid flowing down a vertical surface, length l and width w and film thickness S, at a distance y from the solid surface, a force balance gives: y wl g D Rwl D k dux /dy n wl S dux D dy or: and: ux D g k g k 1/n S When y D 0, ux D 0 and the constant D and: ux D g k 1/n y 1/n S 1/n n nC1 nC1 n g K y 1/n nC1 n S n nC1 S nC1 n S C const. I. 33SN (iv) where SN is the thickness of the Newtonian film. 40 A fluid which exhibits non-Newtonian behaviour is flowing in a pipe of diameter 70 mm and the pressure drop over a 2 m length of pipe is 4 ð 104 N/m2 .
The couple transmitted through the fluid to the suspended stationary inner cylinder is resisted by a calibrated spring, the deflection of which allows calculation of the torque, T, and hence the inner wall shearing stress Ri is given by: TD Ri ri 2 ri h This torque T originates from the outer cylinder which is driven at a uniform speed. 01 Nm which just produces motion at the surface of the inner cylinder. 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.