Cerebral aneurysms are a major risk factor for intracranial bleeding with devastating consequences for the patient. One recently established treatment is the implantation of flow-diverters (FD). Methods to predict their treatment success before or directly after implantation are not well investigated yet. The aim of this work was to quantitatively study hemodynamic parameters in patient-specifi...

The first version of an anatomy editing/surgical planning tool targeting anatomical complexity and patient-specific computational fluid dynamics (CFD) analysis is presented. Novel shape editing concepts and human-shape interaction (HSI) technologies have been combined to facilitate interactive shape alterations and grid generation. At a surgery planning phase, these tools are applied to design ...

Visualization of CFD simulation data on unstructured, 3D grids poses several challenges. The wide range of real-world data set sizes and the geometric versatility within individual, unstructured CFD simulation models present special challenges to the engineers analyzing flow simulation results. Users also face perceptual problems such as occlusion, visual complexity, lack of directional cues, a...

Use of large scale computational fluid dynamics (CFD) models in aeroengine design has grown rapidly in recent years as parallel computing hardware has become available. This has reached the point where research aimed at the development of CFD-based “virtual engine test cells” is underway, with considerable debate of the subject within the industrial and research communities. The present paper c...

The concept behind immersion lithography is the insertion of a high refractive index liquid in the space between the final projection lens of an exposure system and the device wafer to improve the overall resolution of the exposure process. Computational fluid dynamics (CFD) simulations were performed in order to investigate the process of initially filling the lens-wafer gap with immersion flu...

Algebraic multi-zone infiltration models (e.g. COMIS, CONTAM) have been developed to predict air flows and contaminant transport in complex buildings. However these models assume that each building zone is a well-mixed volume. This assumption is not appropriate to model large indoor spaces. We describe two simplified approaches, called zonal methods, to describe air flows in large indoor spaces...

In this study, the thermal characteristics of turbulent nanofluid flow in a helical tube in the tube heat exchanger (HTTHE) were assessed numerically through computational fluid dynamics (CFD) simulation. The findings of both the turbulent models: realizable k-epsion (k-ε) and re-normalisation group (RNG) k-epsilon were compared. The temperature distribution contours show that realizable and RN...

The objective of this study is to find a correlation between the abdominal aortic aneurysm (AAA) geometric parameters, wall stress shear (WSS), abdominal flow patterns, intraluminal thrombus (ILT), and AAA arterial wall rupture using computational fluid dynamics (CFD). Real AAA 3D models were created by three-dimensional (3D) reconstruction of in vivo acquired computed tomography (CT) images fr...

A combined computational fluid dynamics (CFD) and experimental study of interaction of main gas path and rim sealing flow is reported. The experiments were conducted on a two stage axial turbine and included pressure measurements for the cavity formed between the stage 2 rotor disc and the upstream diaphragm for two values of the diaphragm-to-rotor axial clearance. The pressure measurements ind...

Explosions will, in most cases, generate blast waves. While simple models (e.g., Multi Energy Method) are useful for simple explosion geometries, most practical explosions are far from trivial and require detailed analyses. For a reliable estimate of the blast from a gas explosion it is necessary to know the explosion strength. The source explosion may not be symmetric; the pressure waves will ...