A Darcy law for the drift velocity in a two-phase flow model
This work deals with the design and numerical approximation of an Eulerian mixture model for the simulation of two-phase dispersed flows. In contrast to the more classical two-fluid or Drift-flux models, the influence of the velocity disequilibrium is taken into account through dissipative second-or...
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| Veröffentlicht in: | Journal of computational physics 2007-05, Vol.224 (1), p.288-313 |
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| container_title | Journal of computational physics |
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| creator | Guillard, H. Duval, F. |
| description | This work deals with the design and numerical approximation of an Eulerian mixture model for the simulation of two-phase dispersed flows. In contrast to the more classical two-fluid or Drift-flux models, the influence of the velocity disequilibrium is taken into account through dissipative second-order terms characterized by a Darcy law for the relative velocity. As a result, the convective part of the model is always unconditionally hyperbolic. We show that this model corresponds to the first-order equilibrium approximation of classical two-fluid models. A finite volume approximation of this system taking advantage of the hyperbolic nature of the convective part of the model and of the particular structural form of the dissipative part is proposed. Numerical applications are presented to assess the capabilities of the model. |
| doi_str_mv | 10.1016/j.jcp.2007.02.025 |
| format | Article |
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| identifier | ISSN: 0021-9991 |
| ispartof | Journal of computational physics, 2007-05, Vol.224 (1), p.288-313 |
| issn | 0021-9991 1090-2716 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | APPROXIMATIONS Bubbly flows Chapman–Enskog expansion CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Computational techniques COMPUTERIZED SIMULATION DARCY LAW Drift-flux Exact sciences and technology FLUIDS Mathematical methods in physics MATHEMATICAL MODELS MIXTURES Physics Riemann solver TWO-PHASE FLOW Two-phase flows VELOCITY |
| title | A Darcy law for the drift velocity in a two-phase flow model |
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