Browsing by Author "Lauser, Andreas"

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    Theory and numerical applications of compositional multi-phase flow in porous media
    (2014) Lauser, Andreas; Helmig, Rainer (Prof. Dr.-Ing.)
    For many multi-phase flow and transport processes in porous media, miscibility of the constituent components (i.e., the chemical compounds of the fluids) is a non-negligible part of the governing physics. This thesis covers several theoretical and numerical aspects of such flows. First, the continuum-scale equations are motivated starting from the molecular scale. Then, techniques to discretize these equations are presented while keeping their parallel implementation by computer programs in mind. After the theoretical, numerical, and implementation-related aspects of such flows are covered, this thesis examines some sample applications to illustrate various computational and physical properties of such flows. Finally, this thesis is concluded and a list of related fields which it does not cover is given. The main contribution of this thesis to the scientific state of the art is the proposal of non-linear complementarity problem (NCP) based model assumptions to handle phase transitions in compositional simulations of flow in porous media as well as an extensive evaluation of its properties relative to established approaches - such as the primary variable switching (PVS) and the black-oil models.