Abstract The generation of three‐dimensional unstructured grids using the advancing‐front technique is described. This has been shown to be effective for in two dimensions. 1,2 However, its extension regions required algorithms define surface and suitable data structures that avoid excessive CPU‐time overheads search operations involved. After obtaining an initial triangulation surfaces, tetrahedra are generated by successively deleting faces from front. Details grid algorithm given,...

Abstract A high resolution finite element method for the solution of problems involving speed compressible flows is presented. The uses concepts flux‐corrected transport and presented in a form which suitable implementation on completely unstructured triangular or tetrahedral meshes. Transient steady‐state examples are solved to illustrate performance algorithm.

Abstract The difficulties experienced in the treatment of hyperbolic systems equations by finite element method (or other) spatial discretization procedures are well known. In this paper a temporal precedes one which principle is considered along characteristics to achieve self adjoint form. By suitable expansion, original co‐ordinates preserved and combined with use standard Galerkin process an accurate discretization. It shown that equivalent Taylor‐Galerkin methods Donea. 17 Several...

A Laplacian smoothing of the mesh velocities with variable diffusivity based on distance from moving bodies is introduced. This enforces a more uniform velocity in region close to bodies. Given that most applications these are regions where small elements located, new procedure decreases element distortion considerably, reducing need for local or global remeshing, and some cases avoiding it altogether.

Abstract Several data structures for the generation of unstructured grids are described. Their usefulness stems from fact that they enable necessary search operations to be performed in an optimal way. In particular, we describe heap lists, quad‐ and octrees, linked lists. Combining these structures, important problem interpolating information between is also solved.

Abstract Techniques used to implement an unstructured grid solver on modern graphics hardware are described. The three‐dimensional Euler equations for inviscid, compressible flow considered. Effective memory bandwidth is improved by reducing total global access and overlapping redundant computation, as well using appropriate numbering scheme data layout. applicability of per‐block shared also performance the demonstrated two benchmark cases: a NACA0012 wing missile. For variety mesh sizes,...

Abstract An adaptive finite element scheme for transient problems is presented. The classic h‐enrichment/coarsening employed in conjunction with a tetrahedral discretization three dimensions. A mesh change performed every n time steps, depending on the Courant number and of ‘protective layers’ added ahead refined region. In order to simplify refinement/coarsening logic be as fast possible, only one level allowed per change. high degree vectorizability has been achieved by pre‐sorting...

The loose coupling of computational fluid dynamics and structural solvers introduces some problems related to the information transfer between codes. Some techniques developed solve load interface surface tracking are presented. main criterion is achieve conservation total loads energy. projection scheme based on Gaussian integration fast interpolation algorithms for unstructured grids. algorithm, also interpolation, important many applications, including aeroelastic deformation wings due...

We describe the development, validation, and application of a new finite element scheme for solution compressible Euler equations on unstructured grids. The implementation numerical is based an edge-based data structure, as opposed to more traditional element-based structure. use this structure not only improves efficiency algorithm but also enables straightforward upwind schemes in context methods. has been tested validated some well-documented configurations. A flow about complete F-18...

Abstract The successful application of computational modelling blood flow for the planning surgical and interventional procedures to treat cardiovascular diseases strongly depends on rapid construction anatomical models. large individual variability human vasculature strong dependence characteristics vessel geometry require a patient‐specific basis. Various image processing geometrical techniques are integrated surface models arteries starting from medical images. These discretely defined...