A space-time Finite Volume method is devised to simulate incompressible viscous flows in an evolving domain. Inspired by the ADER (based on a Finite-Element-prediction/Finite-Volume-correction approach), Navier-Stokes equations are discretized onto overset grid which able take into account both shape of possibly moving object and evolution compact transmission condition employed order mutually ...

This work concerns the development of an adaptive multi-solver approach for CFD simulation of viscous flows. Curvilinear grids are used near solid bodies to capture boundary layers, and stuctured adaptive Cartesian grids are used away from the body to fill the majority of the computational domain. An edge-based meshless scheme is used in the interface region to connnect the near-body and off-bo...

We present a GPU-accelerated, arbitrary-order, nearly quadrature-free, Runge-Kutta (RK) discontinuous Galerkin (DG) approach to interface capturing for atomizing multiphase flows via the conservative level set (CLS) method [3, 4]. An arbitrary-order DG numerical method is utilized for both advection and reinitialization, further developing the ideas of [1] by implementing a quadrature-free appr...

In this study, the applicability of CFD to design optimal arrangement hull FIN, which is one energy-saving devices, was investigated. Considering calculation environment at site a shipyard, with overset grid approach applied because it possible maintain accuracy for estimating effect small number grids. The FIN attached JBC form, and installation position in front/rear vertical directions on As...

Combustion of a single, resolved carbon particle is studied using novel numerical approach that makes use an overset grid. The model implemented into the framework compressible Direct Numerical Simulation (DNS) code. A method to artificially reduce speed sound presented. For Mach numbers lower than ?0.1 this may dramatically improve efficiency without affecting any physical aspects except for a...

In this paper, theoretical results are described on the maximum norm stability and accuracy of finite difference discretizations of parabolic equations on overset nonmatching space-time grids. We consider parabolic equations containing a linear reaction term on a space-time domain Ω× [0, T ] which is decomposed into an overlapping collection of cylindrical subregions of the form Ωl ×[0, T ], fo...

The screw compressor in the early stage of development is generally known as the oil-injection type. However, escalating environmental problems and advances in electronic components have spurred continuous R & D to minimize the oil content in compressed air. The oil-free twin-screw compressor is continuously compressed by inner volumetric change between rotors and casing. Fo this reason, in ord...