This subnode should be used to model the heat transfer due to hydrodynamic mixing in a fluid flowing through a porous medium. It adds an extra term ∇ ⋅ (kdisp∇T) to the right-hand side of the heat equation in porous media, through the modification of the effective thermal conductivity
keff with the dispersive thermal conductivity
kdisp:
This section sets the
Longitudinal dispersivity λlo and
Transverse dispersivity λtr used for the definition of the tensor of dispersive thermal conductivity:
and λijkl is the fourth-order dispersivity tensor
If the Extended porous matrix model is selected under
Physical Model (with the Subsurface Flow Module), the
Transverse horizontal dispersivity λtr, h and
Transverse vertical dispersivity λtr, v are defined instead of the
Transverse dispersivity λtr.
In this case it is assumed that z is the vertical direction and it defines the dispersion tensor as
More locations are available if the Heat transfer in porous media check box is selected under the
Physical Model section. For example:
Physics Tab with Porous Medium selected in the model tree: