Direct numerical simulations of three-dimensional bubbly flows
نویسندگان
چکیده
منابع مشابه
Studies of Bubbly Channel Flows by Direct Numerical Simulations
Recent DNS studies of buoyant bubbly flows in vertical channels are discussed. Simulations of nearly spherical bubbly flows in vertical channels show that the bubbles move towards the wall for upflow and away from the wall for downflow in such a way that the core is in hydrostatic equilibrium. For downflow the wall layer is free of bubbles but for upflow there is an excess of bubbles in the wal...
متن کاملDirect Numerical Simulations of Three-Dimensional Cavity Flows
Three-dimensional direct numerical simulations of the full compressible Navier–Stokes equations are performed for cavities that are homogeneous in the spanwise direction. The formation of oscillating spanwise structures is observed inside the cavity. We show that this 3D instability arises from a generic centrifugal instability mechanism associated with the mean recirculating vortical flow in t...
متن کاملDirect numerical simulations of three-dimensional flows past obstacles with a vortex penalization method
A vortex method with penalization is proposed in order to simulate three-dimensional incompressible bluff body flows. This approach combines the robustness of vortex methods and the flexibility of penalization methods to impose boundary conditions on the obstacle. Far field boundary conditions are handled in a FFT-based Poisson solver. A validation of the proposed numerical method is carried ou...
متن کاملParticle methods for direct numerical simulations of three - dimensional wakes †
In this paper we describe recent advances in the development of particle methods for the direct numerical simulations of three-dimensional wakes. Both body-fitted and immersed boundary techniques are considered. The accuracy and numerical cost of the proposed numerical methods are discussed on the benchmark cases of a flow past a cylinder and of a vortex ring impinging on a cylinder. PACS numbe...
متن کاملA Numerical Model for Three Dimensional Polydisperse Bubbly Flows around Surface Ships
A model for simulating three dimensional polydisperse two-fluid open bubbly flows is presented. The polydisperse model is based on an integro-differential equation for the bubble size distribution function. A multigroup approach is used to discretize the equations in groups of constant mass. The resulting system has four scalar equations (mass and momentum) for the liquid phase and for each gro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1999
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.870105