Thermal Diffusivity Of Marble

These will be discussed later in this chapter.

Thermal diffusivity of marble.

Heat loss or gain can occur in three modes. 39 28 26 24 22 n g. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. 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.

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. Thermal diffusivity is usually denoted α but a κ k and d are also used. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.

Thermal diffusivity a with the unit mm 2 s is a material specific property for characterizing unsteady heat conduction. Definition of thermal diffusivity. 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 measures the rate of transfer of heat of a material from the hot side to the cold side.

14 i 12. Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4. Thermal diffusivity and thermal expansion. Conduction convection and radiation.

This value describes how quickly a material reacts to a change in temperature.