Burgers’ Equation and Layered Media: Exact Solutions and Applications to Soil-water Flow
نویسندگان
چکیده
Exact solutions are presented for Burgers’ equation in a fmite layer connected to an underlying semi-infinite medium of different conductivity and diffusivity. A constant-flux boundary condition is assumed at the surface. This has direct application to steady rainfall on layered field soils. At large times, a travelling wave profile develops in the deep layer and the concentration in the upper layer approaches a non-trivial steady state. Water flux and potential energy are continuous across the interface but the concentration gradient may show a marked discontinuity.
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