Thermal Diffusivity Of Marble

14 i 12.

Thermal diffusivity of marble.

All modes in heat transfer are from high temperature to a lower temperature and require an existence of a temperature difference. 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. It has the si unit of m s. Definition of thermal diffusivity.

39 28 26 24 22 n g. Thermal diffusivity of air dried barre granite westerly granite salem limestone and holston marble as a function of temperature. These will be discussed later in this chapter. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.

Thermal diffusivity and thermal expansion. Heat loss or gain can occur in three modes. 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.

W 1 i0 sioux quartzite o berea sandstone o st. Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4. This value describes how quickly a material reacts to a change in temperature. It measures the rate of transfer of heat of a material from the hot end to the cold end.

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