Thermal Diffusivity Of Marble

14 i 12.

Thermal diffusivity of marble.

This value describes how quickly a material reacts to a change in temperature. W 1 i0 sioux quartzite o berea sandstone o st. 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. These will be discussed later in this chapter.

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

Thermal diffusivity a with the unit mm 2 s is a material specific property for characterizing unsteady heat conduction. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4. 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. 39 28 26 24 22 n g. It measures the rate of transfer of heat of a material from the hot side to the cold side. Conduction convection and radiation.

It measures the rate of transfer of heat of a material from the hot end to the cold end.