IUTAM Symposium on Dynamics and Stability of Fluid Interfaces: April 2-5th 2018, University of Florida, Gainesville, Florida
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Dynamics of interfaces between fluids and fluids/solids are common in natural and engineered flows. Two-phase flows are key to processes including additive manufacturing, printing, coating, fuel combustion, pipeline transport, nuclear cooling, concentrated solar power, aircraft de-icing, and food preservation, among many others. Break-up, coalescence and capillary reconfiguration of interfaces are often crucial features of simulating two-phase flow.
On the simulation side, major advances have been made using level set, volume of fluid, and phase-field methods over the past ten years. For all these techniques, robust, conservative, and converging simulations in 2D and 3D have been demonstrated, and physics-based handling of contact line dynamics are now becoming commonplace and accurate solutions from first principles are obtained. Yet, the cost of such simulations – while dropping rapidly – remains high, and therefore their usefulness remains limited. In addition, because the microscale physics of topology changes and contact line dynamics take place below grid resolution, obtaining grid-independent simulation results becomes a formidable challenge. Systematically embedding reliable reduced-order models to represent sub-grid scale flow physics would reduce computational cost and provide a clear path towards mesh-independent handling of solutions.
On the modeling side, nonlinear phenomena can now be addressed by tools that include weakly nonlinear analysis, long-wave theory, energy methods and reduced-order methods. Bifurcation approaches yield accurate dynamics and evolution well beyond linear instability. For rapid advancement in mechanistic understanding of such complex processes, the modeling effort is best complemented with first-principle simulation data. Conversely, simulations can benefit greatly from the integration of reliable reduced-order models to capture complex flow physics without requiring resolution of all scales.
The aim of the symposium is to bring computational and modeling experts together to address major issues in fluid interfaces and contact-lines from the two perspectives of simulation and modeling. The speakers will represent a diverse group of applied physicists, applied mathematicians and engineers.