We present a novel method for solving the incompressible Navier-Stokes equations that more accurately handles arbitrary boundary conditions and sharp geometric features in the fluid domain. It uses a space filling tetrahedral mesh, which can be created using many well known methods, to represent the fluid domain. Examples of the method’s strengths are illustrated by free surface fluid simulatio...

OBJECTIVES To develop an animal model of rhinosinusitis in microgravity, to characterize the behavior of intracavitary fluid in microgravity, and to assess the accuracy of ultrasonographic (US) diagnosis in microgravity. DESIGN An animal model of acute sinusitis was developed in anesthetized swine by creating a window into a frontal sinus to allow unilateral catheter placement and injection o...

To correlate blunt bowel perforation with CT findings of extraluminal air, extraluminal f luid, and unexplained extraluminal fluid and determine their diagnostic values. During a study period of 30 months, the CT findings of 394 patients with abdominal trauma were prospectively recorded. A retrospective chart review of these patients for bowel injuries, choice of treatments, and final outcome w...

PURPOSE To examine anatomical changes in idiopathic macular holes during surgery using handheld spectral-domain optical coherence tomography (SD-OCT). METHODS Five eyes of 5 patients who underwent surgery for the repair of idiopathic macular holes were examined. The surgery included standard 25-gauge, 3-port pars plana vitrectomy, removal of the internal limiting membrane (ILM), fluid-air exc...

The presence of air/fluid surrounding implantable devices used for partial breast irradiation may significantly impact dose coverage to at-risk tissue. Of the 67 total patients retrospectively evaluated for this study, 32 (48%) had greater than 1 cc volume of air/fluid extending outside of the strut-adjusted volume implant (SAVI) device surface and were selected for comparison of planning appro...

This paper uses computational fluid dynamics (CFD), in the form of OpenFOAM software package, to investigate forces on salt core high-pressure die casting (HPDC) when being exposed impact inflowing melt filling stage, with particular respect moment first impact—commonly known as slamming. The melt-air system is modelled via an Eulerian volume-of-fluid approach, treating air a compressible perfe...

PURPOSE To evaluate magnetic resonance (MR) hydrometry, a method of quantifying fluid amounts by using MR imaging, for assessing the exocrine function of the pancreas after stimulation with secretin. MATERIALS AND METHODS Images were obtained with a single-shot turbo spin-echo sequence by using a 1.0-T magnet with a quadrature body coil. Image postprocessing and evaluation were performed at a...

The ability to breathe air represents a fundamental step in vertebrate evolution that was accompanied by several anatomical and physiological adaptations. The morphology of the air-blood barrier is highly conserved within air-breathing vertebrates. It is formed by three different plies, which are represented by the alveolar epithelium, the basal lamina, and the endothelial layer. Besides these ...