The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to
Stanton number
Biot number
Peclet number
Grashoff number
- The use of heat exchangers is made in
- Which of the following statement is wrong?
- The critical thickness of insulation for a sphere is
- According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to…
- According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure…
- Reynolds number is the ratio of
- Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A…
- The heat of sun reaches to us according to
- The radiation emitted by a black body is known as
- 40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If…
- According to Newton's law of cooling, the heat transfer from a hot body to a cold body is
- In heat exchangers, degree of approach is defined as the difference between temperatures of
- Film coefficient is defined as Inside diameter of tube
- A grey body is one whose absorptivity
- Temperature of steam at around 540°C can be measured by
- The process of heat transfer from one particle of the body to another by the actual motion of the heated…
- Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take…
- In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in
- Which of the following is the case of heat transfer by radiation?
- Pick up the wrong case. Heat flowing from one side to other depends directly on
- Conduction is a process of heat transfer
- Total heat is the heat required to
- Thermal conductivity of a material may be defined as the
- The concept of overall coefficient of heat transfer is used in case of heat transfer by
- The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
- Depending on the radiating properties, a body will be black when
- Depending on the radiating properties, a body will be white when
- Total emissivity of polished silver compared to black body is
- Thermal diffusivity of a substance is
- Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of…