Thermal Diffusivity Of Marble

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

Thermal diffusivity of marble.

Clouo qranodiorite v dresser basalt 300 400 500 600 700 800 900 i000 temperature k fig 4. Thermal diffusivity of air dried barre granite westerly granite salem limestone and holston marble as a function of temperature. In heat transfer analysis thermal diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure. W 1 i0 sioux quartzite o berea sandstone o st.

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. These will be discussed later in this chapter.

It has the si unit of m s. Thermal diffusivity a with the unit mm 2 s is a material specific property for characterizing unsteady heat conduction. 14 i 12. Definition of thermal diffusivity.

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

All modes in heat transfer are from high temperature to a lower temperature and require an existence of a temperature difference.