Thermal Conductivity of Clay
I am wondering what the thermal conductivity (in W/m-K)is
for clay (or for different types of clay)?
The thermal conductivity of soils is mostly controlled by water content,
although, obviously, the type of soil is also important. For an average
clay, the thermal conductivity in W/(m K) is 0.25 for no soil moisture,
about 1.0 for 10% soil moisture (% by volume), 1.25 at 14% (a bend in the
thermal conductivity curve occurs here), 1.67 at 30%, and about 2.0 at
50%. That will give you
a rough idea.
David R. Cook
Environmental Research Division
Argonne National Laboratory
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Update: June 2012