Which area is used in case of heat flow by conduction through a cylinder ?
Correct answer: D. Logarithmic mean area
- A. None of these
- B. Arithmetic mean area
- C. Geometric mean area
- D. Logarithmic mean area
Explanation
Radial heat flow through a cylinder occurs over an area that changes with radius, so the appropriate equivalent area is the logarithmic mean area. An arithmetic mean area is only an approximation.
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