نتایج جستجو برای: روش vof

تعداد نتایج: 370317  

Journal: :Dalton transactions 2014
Farida H Aidoudi Cameron Black Kasun S Athukorala Arachchige Alexandra M Z Slawin Russell E Morris Philip Lightfoot

There are only limited reports on vanadium(iv) oxyfluorides (VOFs) with extended crystal structures. Here we expand and enrich the list of existing VOFs with a series of 14 new materials "VOF-n (n = 1-14)" prepared using ionothermal and solvothermal synthesis methods. All of these materials arise from the condensation of a dimeric structural motif. These VOFs can be classified into three groups...

Journal: :AJNR. American journal of neuroradiology 2006
I van der Schaaf E-J Vonken A Waaijer B Velthuis M Quist T van Osch

BACKGROUND CT perfusion (CTP) is an important diagnostic tool for the imaging of cerebral hemodynamics. To obtain quantitative values of cerebral blood volume (CBV), blood flow (CBF), and mean transit time (MTT), measurement of the arterial input function (AIF) is required. To correct for partial volume effects (PVEs), it is common to normalize the AIF with respect to the venous output function...

Journal: :J. Comput. Physics 2010
Milan Kucharik Rao V. Garimella Samuel P. Schofield Mikhail J. Shashkov

In this paper we compare the performance of different methods for reconstructing interfaces in multi-material compressible flow simulations. The methods compared are a material-order-dependent Volume-of-Fluid (VOF) method, a material-orderindependent VOF method based on power diagram partitioning of cells and the Moment-of-Fluid method (MOF). We demonstrate that the MOF method provides the most...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Jason D Yeatman Kevin S Weiner Franco Pestilli Ariel Rokem Aviv Mezer Brian A Wandell

The vertical occipital fasciculus (VOF) is the only major fiber bundle connecting dorsolateral and ventrolateral visual cortex. Only a handful of studies have examined the anatomy of the VOF or its role in cognition in the living human brain. Here, we trace the contentious history of the VOF, beginning with its original discovery in monkey by Wernicke (1881) and in human by Obersteiner (1888), ...

Journal: :Cerebral cortex 2016
Hiromasa Takemura Ariel Rokem Jonathan Winawer Jason D Yeatman Brian A Wandell Franco Pestilli

Human visual cortex comprises many visual field maps organized into clusters. A standard organization separates visual maps into 2 distinct clusters within ventral and dorsal cortex. We combined fMRI, diffusion MRI, and fiber tractography to identify a major white matter pathway, the vertical occipital fasciculus (VOF), connecting maps within the dorsal and ventral visual cortex. We use a model...

2003
C. W. HIRT

Several methods have been previously used to approximate free boundaries in tinitedifference numerical simulations. A simple, but powerful, method is described that is based on the concept of a fractional volume of fluid (VOF). This method is shown to be more flexible and efftcient than other methods for treating complicated free boundary configurations. To illustrate the method, a description ...

2009
D. L. Sun W. Q. Tao

A coupled volume-of-fluid and level set (VOSET) method, which combines the advantages and overcomes the disadvantages of VOF and LS methods, is presented for computing incompressible two-phase flows. In this method VOF method is used to capture interfaces, which can conserve the mass and overcome the disadvantage of nonconservation of mass in LS method. An iterative geometric operation proposed...

Journal: :Cerebral cortex 2017
Hiromasa Takemura Franco Pestilli Kevin S Weiner Georgios A Keliris Sofia M Landi Julia Sliwa Frank Q Ye Michael A Barnett David A Leopold Winrich A Freiwald Nikos K Logothetis Brian A Wandell

We compare several major white-matter tracts in human and macaque occipital lobe using diffusion magnetic resonance imaging. The comparison suggests similarities but also significant differences in the tracts. There are several apparently homologous tracts in the 2 species, including the vertical occipital fasciculus (VOF), optic radiation, forceps major, and inferior longitudinal fasciculus (I...

2010
Seong-Su Jeon Seong-Jin Kim

In this study, direct numerical simulation for the bubble condensation in the subcooled boiling flow was performed. The main goal was to develop the CFD modeling for the bubble condensation and to evaluate the accuracy of the VOF model with the developed CFD modeling. CFD modeling for the bubble condensation was developed by modeling the source terms in the governing equations of VOF model usin...

Journal: :Computers & Mathematics with Applications 2013
Christian F. Janßen Stephan T. Grilli Manfred Krafczyk

In this paper, we present extensions, extensive validations and applications of our previously published hybrid volume-of-fluid-based (VOF)model for the simulation of freesurface flow problems. For the solution of the flow field, the lattice Boltzmann method is used, where the free surface is represented by a VOF approach. The advection equation for the VOF fill level is discretized with a fini...

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