Question

Select the option that is false:

a) A small number of Biot represents little resistance to heat conduction and, therefore, small temperature gradients within the body.

b) The Fourier number is a measure of the heat conducted through a body in relation to the stored heat.

c) None of the other options is false

d) The Prandtl number does not depend on the type of flow and its geometric configuration

e) The Biot number compares the transfer of thermal energy through a fluid by convection against the transfer by conduction through the same fluid

Answer 1

See the attachments below

Option (e) is false as there must be conduction in solid in denominator in biot number .

Option (D) is correct as all the terms in pocket number is fluid or material property.

Option (b) is correct about Fourier number as defined below.

Option (a) this is correct this is the case of Lumped heat capacity model condition