Wetting transition of simple fluid confined between different parallel walls

By means of dynamics approach, the wetting transitions of a simple fluid confined between parallel walls that exert different surface fields were investigated. The state of the system are sensitive to the surface fields and wall separation. In some cases, even if the difference of two walls is very small, the phenomenon that one wall is wet and the other is non-wet may occur. The wetting transitions may be first order or second order.