Homogenization of diffusion equation with scalar hysteresis operator
Jan Franců · Mathematica Bohemica · 2001
The paper deals with a scalar diffusion equation $ c\,u_t = ({{F}}[u_x])_x + f, $ where ${F}$ is a Prandtl-Ishlinskii operator and $c, f$ are given functions. In the diffusion or heat conduction equation the linear constitutive relation is replaced by a scalar Prandtl-Ishlinskii hysteresis spatially dependent operator. We prove existence, uniqueness and regularity of solution to the corresponding initial-boundary value problem. The problem is then homogenized by considering a sequence of equations of the above type with spatially periodic data $c^\varepsilon $ and $\eta ^\varepsilon $ when the spatial period $\varepsilon $ tends to zero. The homogenized characteristics $c^*$ and $\eta ^*$ are identified and the convergence of the corresponding solutions to the solution of the homogenized equation is proved.