Home

What is the correct answer?

4

The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to

A. -1/3

B. -2/3

C. 1

D. -1

Correct Answer :

A. -1/3


Related Questions

A cube at high temperature is immersed in a constant temperature bath.… Conduction is a process of heat transfer The total radiation from a black body per second per unit area is ________… The heat transfer by conduction through a thick cylinder (Q) is given… In free convection heat transfer transition from laminar to turbulent… Which of the following is expected to have highest thermal conductivity? Thermal conductivity of air with rise in temperature The ratio of the emissive power and absorptive power of all bodies is… Which of the following statement is correct? Radiation is the process of heat transfer in which heat flows from a ________,… The critical thickness of insulation for a sphere is According to Prevost theory of heat exchange The transfer of heat by molecular collision is smallest in When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity… The critical radius is the insulation radius at which the resistance to… The amount of heat flow through a body by conduction is The ratio of the thickness of thermal boundary layer to the thickness… Heat transfer takes place as per The time constant of a thermocouple is Free convection flow depends on When heat is transferred from one particle of hot body to another by actual… The concept of overall coefficient of heat transfer is used in case of… The expression Q = ρ AT4 is called The process of heat transfer from one particle of the body to another… The logarithmic mean temperature difference (tm) is given by (where Δt1… A perfect black body is one which The emissivity for a black body is Thermal conductivity of water in general with rise in temperature According to Stefan's law, the total radiation from a black body per second… Stefan Boltzmann law is applicable for heat transfer by