Page 145 - Modelling in Transport Phenomena A Conceptual Approach

PROBLEMS 125

SUGGESTED REFERENCES FOR FURTHER
STUDY

Brodkey, R.S. and H.C. Hershey, 1988, Transport Phenomena: A Unified
Approach, McGraw-Hill, New York.

Hines, A.L. and R.N. Maddox, 1985, Mass Transfer - Fundamentals and Applica-
tions, Prentice-Hall, Englewood Cliffs, New Jersey.

Incropera, F.P. and D.P. DeWitt, 1996, hndamentals of Heat and Mass Transfer,
4th Ed., Wiley, New York.

Middleman, S., 1998, An Introduction to Mass and Heat Transfer - Principles of
Analysis and Design, Wiley, New York.

Skelland, A.H.P., 1974, Diffusional Mass Transfer, Wiley, New York.

Whitaker, S., 1976, Elementary Heat Transfer Analysis, Pergamon Press, New
York.

PROBLEMS

4.1 Air at atmospheric pressure and 200 "C flows at 8 m/ s over a flat plate 150 cm
long in the direction of flow and 70cm wide.
a) Estimate the rate of cooling of the plate so as to keep the surface temperature
at 30 "C.
b) Calculate the drag force exerted on the plate.
(Answer: a) 1589W b) 0.058N)

4.2 Water at 15 "C flows at 0.15 m/ s over a flat plate 1 m long in the direction of
flow and 0.3 m wide. If energy is transferred from the top and bottom surfaces of the
plate to the flowing stream at a steady rate of 3500 W, determine the temperature
of the plate surface.
(Answer: 35 "C)