Thermal conductivity and diffusivity of soil

Influence of Metallic Molar Ratio on the Electron Spin Resonance and Thermal Diffusivity of Zn–Al Layered Double Hydroxide

“…Thermal properties (including thermal diffusivity) of clays (soils, sands, LDHs, etc.) are very vital parameters in the heat transfer from or to buildings, in the distribution rate of electric cables and in the design of heating systems [10]. Thermal diffusivity of sands (Utah tar sands) has been measured [11] and had a range of 5 × 10 −7 -9 × 10 −7 m 2 s −1 over the temperature range of 27-147 ∘ C using a constant applied heat flux method.…”

“…Thermal diffusivity of sands (Utah tar sands) has been measured [11] and had a range of 5 × 10 −7 -9 × 10 −7 m 2 s −1 over the temperature range of 27-147 ∘ C using a constant applied heat flux method. Thermal diffusivity of soils has been measured using the line heat source transient method [10] between the temperature -10 ∘ C and 35 ∘ C. The effect of moisture content up to 40% on diffusivity was also studied. Hinkel [12] has estimated thermal diffusivity of soils from two different regions which was between 1.5 and 2.1 × 10 −7 m 2 s −1 .…”

An experimental study of soil thermal conductivity using a guarded hot plate apparatus

“…The thermal properties are determined by analyzing the temperature response around the heat source. In particular, the technique is based on measuring the rate at which the heat is conducted away from the probe [8]. One of the limitations of the single probe technique is that it is only able to measure thermal conductivity.…”

An effective thermal conductivity model of geological porous media for coupled thermo-hydro-mechanical systems with multiphase flow

“…In this paper, a more recent empirical interpolating equation, which is recommended for industrial use, is adopted to calculate the thermal conductivity of water according to the International Association for the Properties of Water and Steam (IAPS) formulation for the thermal conductivity of ordinary water substance [24]. The interpolating equation is defined by l w ¼ l n ½l 0 ðTÞ þ l 1 ðrÞ þ l 2 ðT; rÞ (8) where reference thermal conductivity l * ¼ 1.0 W/m K, the dimensionless variables T ¼ T=T n ¼ 0:001545T, and r ¼ r=r n ¼ 0:0031476r. The units of water thermal conductivity, temperature and density are W/m K, K, kg/m 3 , respectively.…”

“…The dependences of the thermal conductivity on temperature, moisture and porosity are not contained in the thermal conductivity synchronously as a function of these variables [1][2][3][4][5][6][7][8][9][10][11]. In addition, most of these simple models are empirical relations whose validities are limited to certain ranges of saturation.…”