Fluid-Structure Interactions in a Tube Bundle Subject to Cross-Flow. Part B : Two-Phase Flow Modeling

摘要

The response of a tube bundle subject to a two-phase cross-flow is investigated using a porous medium approach. This is the second of a two-part paper: in Part A new equations for the fluid and the structure were developed using a volume averaging technique. The main advantage of such an approach is that, compared to DNS, coarser and fixed meshes can be used for unsteady simulations, substantially alleviating the computational cost. The objective of part B is to extend the previous fluid-structure interaction model to two-phase flows. Following the same volume averaging technique, we describe the two-phase mixture using a Euler-Euler formulation. A model for the interaction between the gas and the liquid phase, similar to the fluid structure interaction model, in lumped into the equations. The solid structure, the gas and the liquid phases are fully coupled in a well posed set of equations. The code is verified by the method of manufactured solutions and its ability to represent fluid structure interactions in two-phase flows is assessed by comparing its predictions with results from DNS simulations and previous experimental data.