Heat flux through a material is proportional to the negative gradient of temperature: q = −k ∇T, where k is the thermal conductivity (a material property, W·m⁻¹·K⁻¹). Linear in ∇T and valid in the local-thermodynamic-equilibrium regime.
Heat flux through a material is proportional to the negative gradient of temperature: q = −k ∇T, where k is the thermal conductivity (a material property, W·m⁻¹·K⁻¹). Linear in ∇T and valid in the local-thermodynamic-equilibrium regime.