numerical investigation of two cylinders passing each other, using overset grid method

Numerical Investigation of Non-Newtonians Fluids Flows between Two Rotating Cylinders Using Lattice Boltzmann Method

A numerical investigation is performed for non Newtonian fluids flow between two concentric cylinders. The D2Q9 lattice Boltzmann model developed from the Bhatangar-Gross-Krook (LBGK) approximation is used to obtain the flow field for fluids obeying to the power-law model. The inner and outer cylinders rotate in the same and the opposite direction while the end walls are maintained at rest. The...

An overset grid method for the study of reflex tearing.

We present an overset grid method to simulate the evolution of human tear film thickness subject to reflex tearing. The free-surface evolution is governed by a single fourth-order non-linear equation derived from lubrication theory with specified film thickness and volume flux at each end. The model arises from considering the limiting case where the surfactant is strongly affecting the surface...

An overset-grid method for 3D unsteady incompressible flows

A composite-grid numerical method is developed for simulating unsteady, three-dimensional (3D), incompressible flows in complex geometries. The governing equations are solved using a second-order accurate, finite-volume method based on the dual time-stepping artificial compressibility approach. Overset grids are employed to discretize arbitrarily complex geometries, and a new interface algorith...

Electromagnetic Scattering from Two Eccentric Metamaterial Cylinders with Frequency-dependent Permittivities Differing Slightly Each Other

The interaction between a metamaterial cylindrical structure and an incident plane wave is investigated. The structure is comprised of two cylinders, one embedded into the other, whose effective characteristics vary with the operating frequency following similar laws. Such a model can be used to describe periodic structures, constituting metamaterials, with slightly different features. The well...

An overset grid method coupling an orthogonal curvilinear grid solver and a Cartesian grid solver

Self-propulsion Simulation of ONR Tumblehome Using Dynamic Overset Grid Method

With the great progress in supercomputers and the numerical methods, the application of computational fluid dynamics are advancing rapidly in the field of ship hydrodynamics. And the dynamic overset grid method makes it possible for computing complex ship motions, e.g. ship self-propulsion with moving propellers and rudders. In the present work, CFD-based method coupling with dynamic overset gr...