Single screw compressors (SSCs) have been used in many fields. Compared with other kinds of compressors, the SSC should have many advantages due to its symmetrical structure and well balanced radial gas pressure on the screw rotor. However, its durability is not as good as expected. After operating for several thousand hours, its flow rate often decreases sharply. The essential reason is that t...

Most Delaunay refinement-based meshing algorithms maintain a vertex-free “buffer zone” enclosing the edges and faces in the mesh boundary to guarantee a lower bound on edge lengths. To maintain this buffer zone, vertex insertions on or near the domain boundary must be strictly ordered—it is this ordering requirement that makes parallelization difficult. In this paper, we show that it is possibl...

We develop a partitioning algorithm to decompose complex 2D data into small simple subregions for effective parallel quad meshing. We formulate the partitioning problem for effective parallel quad meshing as a quadratic integer optimization problem with linear constraints. Directly solving this problem is expensive for large-scale data partitioning. Hence, we suggest a more efficient two-step a...

Harvesting of autografts results in donor site morbidities and is limited in scenarios such as large total body surface area burns. In these instances, coverage is increased by meshing grafts at the expense of delayed biologic closure. Moreover, graft meshing increases the likelihood of contraction and hypertrophic scarring, limits range of motion, and worsens cosmesis. Many tissue engineering ...

The wear of star wheel teeth is an importance issue in the single screw compressor. In order to enhance the wearresistance of star wheel teeth, some new profiles of the meshing pair were proposed to replace the currently used straight line envelope profile, such as single column envelope, multi-straight line (or multi-column) envelope. In this paper, a curved surface of the tooth flank is sugge...

Epicyclic gears are used in many applications because they can achieve a large torque/speed ratio in a compact package. In most gearboxes, the estimated spectrum of the vibration signal is symmetric and centered at the meshing frequency. For epicyclic gears, the estimated spectrum is typically asymmetric and the dominant frequency component does not occur at the meshing frequency. This is an im...

Current hexahedral mesh generation techniques rely on a set of meshing tools, which when combined with geometry decomposition leads to an adequate mesh generation process. Of these tools, sweeping tends to be the workhorse algorithm, accounting for at least 50 per cent of most meshing applications. Constraints which must be met for a volume to be sweepable are derived, and it is proven that the...

In this paper, a ribcage FE model of the 50 percentile male composed of all quadrilateral and hexahedral elements were developed using an interactive multi-block hex meshing approach. The block-building and meshing techniques for reducing the model development effort and time were presented by the use of the anatomical symmetry and multiple block edition tools. Furthermore, regional variations ...

In recent work radiance function properties and discontinuity meshing have been used to construct high quality interpolants representing radiance. Such approaches do not consider the combined effect of multiple sources and thus perform unnecessary discontinuity meshing calculations and often construct interpolants with too fine subdivision. In this research we present an extended structured sam...

The Immersive Topology Environment for Meshing (ITEM) is a wizardlike environment, built on top of the CUBIT Geometry and Meshing Toolkit. ITEM is focused on three main objectives: 1) guiding the user through the simulation model preparation workflow; 2) providing the user with intelligent options based upon the current state of the model; and 3) where appropriate, automating as much of the pro...