Fundamentals of Momentum, Heat and Mass Transfer - Solution by James Welty, Charles E. Wicks, Gregory L. Rorrer, Robert E.

By James Welty, Charles E. Wicks, Gregory L. Rorrer, Robert E. Wilson

Basics of Momentum, warmth, and Mass move, now in its 5th variation, keeps to supply a unified remedy of momentum move (fluid mechanics), warmth move, and mass move. This re-creation has been up to date to incorporate extra assurance of recent subject matters similar to biomedical/biological functions in addition to an extra separations subject on membranes. also, the 5th variation will concentrate on an particular problem-solving method that's completely and always applied in the course of the text.

Designed for undergraduates taking delivery phenomena or move and price technique classes.

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Extra resources for Fundamentals of Momentum, Heat and Mass Transfer - Solution Manual

Example text

2. 3. 4. 5. 6. 1 REDWOOD VISCOMETER The Redwood viscometer may be considered as the first orifice meter designed and described by Redwood18 in his address before the Society of the Chemical Industry in 1886. The Redwood viscometer was primarily developed for the determination of the viscosity of petroleum products which follow Newton’s law exhibiting a linear relationship between shearing 48 VISCOSITY OF LIQUIDS stress and the rate of shear under the test conditions. Redwood viscometer is mainly used in the United Kingdom and follows the British Standard IP 70/62.

5 ± 2 mm. The jet is constructed of agate and the central hole is drilled and polished to the maximum possible precision. The upper end of the jet is provided with a concave depression, into which a ball valve for starting and stopping the flow of the oil is fitted. 62 mm. 5 cm deep and spun from a sheet of copper that surrounds the oil cup and is provided with a tap for emptying. The bath is externally heated by means of a suitable electrical resistance wire. Stirring of the oil is provided by means of a cylinder with four wanes surrounding the oil cup.

The sample liquid is poured into a cup which is maintained at a constant temperature by a water or oil bath. The level of the liquid in the cup is adjusted to a definite height, and the liquid is allowed to attain the temperature of the bath. Once the desired temperature is reached, a valve at the base of the cup is opened and the time required for a specific volume of liquid to discharge through the orifice is measured. The efflux time measured in seconds is a totally arbitrary expression of the viscosity and is usually designated as viscometer seconds corresponding to the type of viscometer used.

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