Thermal Diffusivity Of Marble

14 i 12.

Thermal diffusivity of marble.

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

In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. 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. Conduction convection and radiation. Heat loss or gain can occur in three modes.

Definition of thermal diffusivity. It has the si unit of m s. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. Thermal diffusivity is usually denoted α but a κ k and d are also used.

Thermal diffusivity a with the unit mm 2 s is a material specific property for characterizing unsteady heat conduction. Thermal diffusivity and thermal expansion. 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 end to the cold end.

These will be discussed later in this chapter.