CFD Simulations of PMM Test using Local Grid Refinement with an Overset Grid Method

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

Performance enhancement strategies for multi-block overset grid CFD applications

The overset grid methodology has significantly reduced time-to-solution of highfidelity computational fluid dynamics (CFD) simulations about complex aerospace configurations. The solution process resolves the geometrical complexity of the problem domain by using separately generated but overlapping structured discretization grids that periodically exchange information through interpolation. How...

An Adaptive Local Grid Refinement Method for Nonlinear Filtering

Numerical solution of the Zakai equation usually leads to large systems of equations which have to be solved at each time step. An algorithm for the numerical approximation of the Zakai equation is presented, based on discretization schemes provided by Kushner, and by LeGland. We use an a posteriori criterion based on truncation error, to localize reenement regions. We apply the fast adaptive c...

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...

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...