Advances in Fluid Dynamics with emphasis on Multiphase and Complex Flow

The field of fluid mechanics is vast and has numerous and diverse applications. Presented papers from the 11th International Conference on Advances in Fluid Dynamics with emphasis on Multiphase and Complex Flow are contained in this book and cover a wide range of topics, including basic formulations and their computer modelling as well as the relationship between experimental and analytical results. Innovation in fluid-structure approaches including emerging applications as energy harvesting systems, studies of turbulent flows at high Reynold number, or subsonic and hypersonic flows are also among the topics covered. The emphasis placed on multiphase flow in the included research works is due to the fact that fluid dynamics processes in nature are predominantly multi-phased, i.e. involving more than one phase of a component such as liquid, gas or plasma. The range of related problems of interest is vast: astrophysics, biology, geophysics, atmospheric processes, and a large variety of engineering applications. Multiphase fluid dynamics are generating a great deal interest, leading to many notable advances in experimental, analytical, and numerical studies in this area. While progress is continuing in all three categories, advances in numerical solutions are likely the most conspicuous, owing to the continuing improvements in computer power and the software tools available to researchers. Progress in numerical methods has not only allowed for the solution of many practical problems but also helped to improve our understanding of the physics involved. Many unresolved issues are inherent in the very definition of multiphase flow, where it is necessary to consider coupled processes on multiple scales, as well as the interplay of a wide variety of relevant physical phenomena.

Table of Contents:
Section 1: Multiphase flow Three-dimensional validation exercise for FIESTA code: Evolution of shock-driven instabilities; Design of optimal conductance probes for two-phase flow tomography and liquid holdup: Application to the determination of the average void fraction in a region; Simulation of fluid’s aeration: Implementation of a numerical model in an open source environment; Experimental investigation of the transition zone of air–steam mixture jets into stagnant water; Computational investigation of the effect of the aspect ratio on secondary currents in open channels Section 2: Nano and micro fluids Curvature and temperature effect on n-decane transport in narrow carbon nanotubes; Implementation and testing of a new OpenFOAM solver for pressure-driven liquid flows on the nanoscale; Consideration of the microstructure of particle suspension to estimate its intrinsic viscosity Section 3: Computational methods Square cylinder under different turbulent intensity conditions by means of small-scale turbulence; Verification approaches for the 3D static LES simulations of the Stonecutters bridge deck Section 4: Theoretical and computational formulations Study on pinhole leaks in gas pipelines: CFD simulation and its validation; Computational and experimental study on ring tone; Ultrasonic measurement of multi-dimensional velocity vector profile using array transducer; Accurate constitutive relations for shock wave structures in gases