Question

Fourier number may be expressed as ratio of:
(1) Buoyancy to viscous force
(2) Internal thermal resistance of a solid to the boundary
layer thermal resistance
(3) Gravitational and surface tension forces
(4) Heat conduction rate to the rate of thermal energy
storage in a solid

Answer 1

it's answer is 4th point hope it is helpful and one time you want to ask your teacher also

Answer 2

Answer:

The Fourier number may be expressed as the ratio of heat conduction rate to the rate of thermal energy storage in a solid.

Explanation:

What is the Fourier number?

• The Fourier number (Fo) is a dimensionless quantity.
• It is applied for the analysis of transient mass transport systems and computations of unsteady-state heat transfer.
• It is the ratio of heat conduction rate to the rate of thermal energy storage in a solid.

→ The formula for the Fourier number is as follows:

     Fo = αt / L^2

             where, Fo = Fourier number

                            α = thermal diffusivity

                            t = time in seconds

                            L = length

• If the Fourier number is high, it indicates the high rate of heat transfer through the substance.
• And if the Fourier number is low, it indicates the low rate of heat transfer through the substance.

To learn more about the heat expansion of metals,

https://brainly.in/question/16395518

To learn more about the heat conductivity,

https://brainly.in/question/13018342

#SPJ3