OBJECTIVE This study aimed to predict recurrence after coil embolization of unruptured cerebral aneurysms with computational fluid dynamics (CFD) using porous media modeling (porous media CFD). METHOD A total of 37 unruptured cerebral aneurysms treated with coiling were analyzed using follow-up angiograms, simulated CFD prior to coiling (control CFD), and porous media CFD. Coiled aneurysms we...

In the early design phase of automotive sector, the flow field around the vehicle is important in decision making on design changes. It would consume a lot of money and time for multiple prototypes development if adopt traditional testing method which is wind tunnel test. Thus, numerical method such as Computational Fluid Dynamics (CFD) simulation plays an important role here. It is very often ...

In this study, we developed a computation-al fluid dynamics (CFD)-based method to optimize the arrangement of buildings for urban ventilation potential at the conceptual design stage and demonstrated its application in a case study. For CFD-based optimization, three calculation components must be assembled: an optimizer, a geometry/mesh generator, and CFD solver. The optimizer solves the optimi...

Computational fluid dynamics (CFD) simulations quantifying thoracic aortic flow patterns have not included disturbances from the aortic valve (AoV). 80% of patients with aortic coarctation (CoA) have a bicuspid aortic valve (BAV) which may cause adverse flow patterns contributing to morbidity. Our objectives were to develop a method to account for the AoV in CFD simulations, and quantify its im...

Flow of a blood analog is modeled through a patient-specific aortic coarctation using ANSYS Fluent software. Details of the patient data (aortic geometry and prescribed flow conditions) were provided by the MICCAI-STACOM CFD Challenge website. The objective is to predict a blood pressure difference across the rigid coarctation under both rest and exercise (stress) conditions. The supplied STL g...

The lEC 534-8-4:1994 method of predicting audible noise external to a control valve (and inpipe noise levels) relies on the use of experimentally derived "valve specific" input parameters. This paper shows how Computational Fluid Dynamics (CFD) can be used as a too! to obtain these valve specific parameters w/ithout the need for experiment. Three types of 100mm throttling devices are modelled u...

Progress in the development of a homotopy continuation method to globalize the spatiallydiscretized steady flow equations in computational fluid dynamics (CFD) is presented. The algorithm contains many new features developed specifically for application to the large sparse highly parallelized systems encountered in modern CFD. A second-difference dissipation operator common in finite-difference...

Over the past six decades the science of CFD has created a versatile computational toolbox. Still, enough barriers remain; for aeronautical CFD one of the highest ones is slow convergence to steady flow solutions. The importance of reducing method complexity to O(N) is discussed in the light of future massively parallel computing. In the same light a vision is outlined of CFD based on PDEs of t...

The heart is a sophisticated functional organ that plays a crucial role in the blood circulatory system. Hemodynamics within the heart chamber can be indicative of exert cardiac health. Due to the limitations of current cardiac imaging modalities, computational fluid dynamics (CFD) have been widely used for the purposes of cardiac function assessment and heart disease diagnosis, as they provide...

CAD models from conceptual design often follow the “over-the-wall” approach for downstream analyses such as FEA, CFD, heat transfer, and vibrations. The CAD-centric approach consists of using the CAD model as a source of data for downstream applications such as mesh generation, and CFD setup. The CAD model used in the CAD-centric approach contains the geometry to be analyzed and all non-geometr...