The Fourier number can be thought of as a non-dimensional distance. True False T

Question

The Fourier number can be thought of as a non-dimensional distance. True False The "lumped-parameter" (also known as "zero-dimensional" or "lumped capacitance") transient heat conduction analysis will give reasonably accurate predictions if the Fourier number is greater than about 0.2 for any Biot number. True False The "one-term" transient heat conduction analysis will give reasonably accurate predictions if the Biot number is less than about 0.1 for any Fourier number. True False In homework problem 1.7, the heat flux at the middle plane of the glass window (x = 0.5L) is. 2800 W/m^2 1400 W/m^2 5600 W/m^2 It cannot be calculated. In homework problem 1.18, the heat transfer rate for a hand at room conditions is about (assume the surface area of the hand as 0.04m^2): 1.2 W/m^2 1.2 J 0.6 J/s 1.2 J/s

Explanation / Answer

12)

False

Fourier number is a dimensionless number but it can not be thought of as dimensionless distance. Generally Fourier number represents dimensionless time

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