Thermal Diffusivity Of Marble

Thermal diffusivity and thermal expansion.

Thermal diffusivity of marble.

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

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. Conduction convection and radiation. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. These will be discussed later in this chapter.

Thermal diffusivity is usually denoted α but a 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. 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.

Thermal diffusivity of air dried barre granite westerly granite salem limestone and holston marble as a function of temperature. Definition of thermal diffusivity. It has the si unit of m s. This value describes how quickly a material reacts to a change in temperature.

Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4.