A series of Navier-Stokes simulations of a complete Boeing 777-200 aircraft con gured for landing is obtained using a structured overset grid process and the OVERFLOW CFD code. At approach conditions, the computed forces for the 777 computation are within 1.5% of experimental data for lift, and within 4% for drag. The computed lift is lower than the experiment at maximum-lift conditions, but sh...

The highest resolution simulation of geodynamo is performed. The base grid system is the Yin-Yang grid, a spherical overset grid with two congruent components each of which is a part of the usual spherical polar coordinates. High parallelization rate of the Yin-Yang geodynamo code has enabled us to perform the geodynamo simulation with the viscosity one order of magnitude smaller than the previ...

In the curvilinear/immersed boundary (CURVIB) method developed by our group the background computational domain could be discretized with a curvilinear grid within which immersed bodies are treated as sharp-interface boundaries discretized with an unstructured triangular mesh (Fig. 1). The effect of moving immersed bodies is accounted for by reconstructing boundary conditions at the nodes in th...

This article introduces a second-order direction splitting method for solving the incompressible Navier–Stokes–Boussinesq system in spherical shell region. The equations are solved on overset Yin–Yang grids, combined with coordinate transforms. approach allows to avoid singularities at poles and keeps grid size relatively uniform. downside is that subdivided into two equally sized, overlapping ...

Abstract This study proposes a method for modelling the flow interaction of multiple moving objects where field variables are communicated between separate computational domains. Instead using conventional approach with single fixed domain covering whole field, this advances (MCD) in which itself moves line motions an object inside. The domains created around each move independently, and fields...

Abstract A fully conservative overset mesh method is proposed and applied to overcome the metric singularity at symmetry line for blunt bodies, e.g., capsules blunted cones, in general curvilinear coordinates. The placed automatically by avoiding collapse of grid lines using a hexahedral structure contrast prismatic body-orientated mesh. In addition, points coincide with those avoid interpolati...

The present work deals with heat transfer characteristics as well as fluid flow patterns in laminar flow regime for a circular cylinder with six control rods arranged in equilateral triangular geometries. The computations have been carried out by a finite volume approach using the overset grid method. The unsteady flow at Re= 200 and Pr= 0.7 and 7.0 was examined. The effect of the control rods ...