Thermal Diffusivity Of Marble

14 i 12.

Thermal diffusivity of marble.

Heat loss or gain can occur in three modes. W 1 i0 sioux quartzite o berea sandstone o st. Thermal diffusivity of air dried barre granite westerly granite salem limestone and holston marble as a function of temperature. Thermal diffusivity is usually denoted α but a κ k and d are also used.

It measures the rate of transfer of heat of a material from the hot side to the cold side. These will be discussed later in this chapter. Thermal diffusivity and thermal expansion. 39 28 26 24 22 n g.

All modes in heat transfer are from high temperature to a lower temperature and require an existence of a temperature difference. It has the si unit of m s. Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4. Conduction convection and radiation.

It measures the rate of transfer of heat of a material from the hot end to the cold end. Definition of thermal diffusivity. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. It is observed that the values of thermal conductivity thermal diffusivity and specific heat for these marble samples are in close agreement with the earlier reported 1 results 2 3 00 w w m k x 1 23 mm2 s and pc 2 66 mj m3 k on black marble.

In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.