The University of Virginia has been utilizing CFX series software to design and analyze implantable rotary blood pumps for several years. Besides the basic computational fluid dynamics (CFD) calculations and simulations of fluid field for blood pumps, several advanced CFD models were used which were relevant to the analysis of blood pumps or magnetic bearings. A Lagrangian Particle Tracking stu...

The purpose of activated sludge systems is to remove the waste from the polluted water by means of microorganisms. Removing the waste appropriately is one aspect; removing the biosolids from the clean water is another challenge. Hence, the settling tank, in which bioflocs are separated from the liquid by gravity, is a crucial operation in biological wastewater treatment systems. If the settling...

In order to study the capability of computational methods in investigating the mechanisms associated with disease and contaminants transmission in aircraft cabins, the computational fluid dynamics (CFD) models are used for the simulation of turbulent airflow and tracer gas diffusion in a generic aircraft cabin mockup. The CFD models are validated through the comparisons of the CFD predictions w...

PURPOSE Hemodynamic factors are considered to play an important role in initiation and progression of the recurrence after endosaccular coiling of the intracranial aneurysms. We made paired virtual models of completely coiled aneurysms which were subsequently recanalized and compared to identify hemodynamic characteristics related to the recurred aneurysmal sac. MATERIALS AND METHODS We creat...

Numerical flow models have been widely applied in engineering disciplines for many years. In the last few years, there has been a proliferation of the use of Computational Fluid Dynamics (CFD) in the fields of geomorphology and hydrology (see Bates and Lane, 1998). These models enable an improved simulation of important processes providing prediction fields that allow considerable insight into ...

This comparative cross-sectional study was conducted in the pediatric daycare unit, Hospital Universiti Sains Malaysia to determine the prevalence of craniofacial deformities (CFD) and the association between these deformities and different clinical presentations among thalassemia patients. Patients were classified as either craniofacial deformity positive (CFD+) or craniofacial deformity negat...

The Galerkin projection method based on modes generated by the Proper Orthogonal Decomposition (POD) technique is very popular for the dimensional reduction of linearized Computational Fluid Dynamics (CFD) models, among many other typically high-dimensional models in computational engineering. This, despite the fact that it cannot guarantee neither the optimality nor the stability of the Reduce...

Modelling of screw compressors using Computational Fluid Dynamics (CFD) offers better insight into the working chamber of twin screw machines when compared with chamber models. As shown by authors in earlier publications, CFD models predict performance of dry gas and refrigeration compressors fairly accurately. However numerical flow models used for modelling of oil flooded twin screw compresso...

A novel method for clustering computational fluid dynamics (CFD) solution vectors with the goal of building efficient local reduced-order models (ROMs) is proposed. In this method, the clustering process is accelerated through the introduction of triangle-inequality bounds to avoid unnecessary computation during K-Means, and the accuracy of the resulting ROM simulation is improved through the i...

Surgem is an interactive anatomy-editing tool for surgery planning developed to enable the surgeon to directly edit the detailed models of patient-specific anatomies according to the contemplated surgical options and to compare such options by using the results of computational fluid dynamics (CFD) analysis. Surgem combines powerful free-form shape deformation tools with new human-shape interac...