Thermal Diffusivity Of Marble

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

Thermal diffusivity of marble.

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. Heat loss or gain can occur in three modes. It measures the rate of transfer of heat of a material from the hot end to the cold end. 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. It measures the rate of transfer of heat of a material from the hot side to the cold side. All modes in heat transfer are from high temperature to a lower temperature and require an existence of a temperature difference. Thermal diffusivity of air dried barre granite westerly granite salem limestone and holston marble as a function of temperature.

Thermal diffusivity a with the unit mm 2 s is a material specific property for characterizing unsteady heat conduction. Thermal diffusivity is usually denoted α but a κ k and d are also used. These will be discussed later in this chapter. It has the si derived unit of m s thermal diffusivity is usually denoted α but a h κ k and d are also used.

W 1 i0 sioux quartzite o berea sandstone o st. Definition of thermal diffusivity. Thermal diffusivity and thermal expansion. 14 i 12.

39 28 26 24 22 n g.