نتایج جستجو برای: 3d روش vof

تعداد نتایج: 558211  

Journal: :European journal of histochemistry : EJH 2005
C Sarasquete M Gutiérrez

A new VOF Type III-G.S stain was applied to histological sections of different organs and tissues of healthy and pathological larvae, juvenile and adult fish species (Solea senegalensis; Sparus aurata; Diplodus sargo; Pagrus auriga; Argyrosomus regius and Halobatrachus didactylus). In comparison to the original Gutiérrez VOF stain, more acid dyes of contrasting colours and polychromatic/metachr...

ژورنال: مهندسی دریا 2014

When studying the structural response of rubble mound breakwaters to wave loading, the knowledge of water surface fluctuations, pore pressure variations and related wave attenuation inside the porous structure is important since the pore pressures affect most responses, such as wave run-up, wave overtopping, reflections, transmission and the hydraulic and geotechnical stability of the breakwate...

BABAEI R., , DADASHZADEH M., , DAVAMI P., , HOMAYONIFAR P., , SHAHINFAR S., ,

In the present study a Finite Difference Method has been developed to model the transient incompressible turbulent free surface fluid flow. A single fluid has been selected for modeling of mold filling and The SOLA VOF 3D technique was modified to increase the accuracy of simulation of filling phenomena for shape castings. For modeling the turbulence phenomena k-e standard model was used. In or...

ژورنال: دریا فنون 2016

شبیه‌سازی عددی امواج غیرخطی در کاربردهای عملی از اهمیت خاصی برخوردار است. در این مقاله جزئیات توسعه‌ی یک مدل عددی دوبعدی در قائم که در آن از روش حجم سیال تکه‌ای‌خطی برای ضبط سطح آزاد استفاده شده، ارائه شده است. در این مدل معادلات میانگین‌گیری شده‌ی نویر- استوکس به روش حجم محدود گسسته شده و با کمک روش پروجکشن حل می‌شوند. برای مدل‌سازی اثرات آشفتگی جریان از مدل با در نظر گرفتن جملات شناوری استفاد...

2009
P. A. Ferdowsi M. Bussmann

Among numerous methods for numerical simulation of two-phase flows, e.g. wave impact to marine vessels and ocean structures, the volume-of-fluid (VoF) method is one that can exactly preserve the volume of each phase [4, 5]. In the VoF method, the volume fraction f of one phase is considered as a reference, and defined in each cell as the ratio of the volume occupied by that phase to the total c...

Journal: :Investigative ophthalmology & visual science 2015
Yiran Duan Anthony M Norcia Jason D Yeatman Aviv Mezer

PURPOSE In order to better understand whether white matter structural deficits are present in strabismic amblyopia, we performed a survey of the tissue properties of 28 major white matter tracts using diffusion and quantitative magnetic resonance imaging approaches. METHODS We used diffusion-based tensor modeling and a new quantitative T1 protocol to measure fractional anisotropy (FA), mean d...

This article describes a 3D CFD (computational fluid dynamics) simulation implementation of the stepped planning hull in calm water. The turbulent free surface flow around the stepped planing hull is computed with a RANSE method, using the solver ANSYS-CFX. The turbulence model used is standard k–ε. In order to simulate the disturbed free surface, VOF model is implemented. The CFD model has bee...

Journal: :Magnetic resonance imaging 2013
Linda Knutsson Freddy Ståhlberg Ronnie Wirestam Matthias J van Osch

PURPOSE To evaluate whether a non-linear blood ΔR2*-versus-concentration relationship improves quantitative cerebral blood flow (CBF) estimates obtained by dynamic susceptibility contrast (DSC) MRI in a comparison with Xe-133 SPECT CBF in healthy volunteers. MATERIAL AND METHODS Linear as well as non-linear relationships between ΔR2* and contrast agent concentration in blood were applied to t...

2015
Chi Wai Chow Serge Belongie Jan Kleissl David Renne

Techniques for estimating cloud motion and stability for intra-hour forecasting using a ground-based sky imaging system are presented. A variational optical flow (VOF) technique was used to determine the sub-pixel accuracy of cloud motion for every pixel. Cloud locations up to 15 min ahead were forecasted by inverse mapping of the cloud map. A month of image data captured by a sky imager at UC ...

Journal: :Journal of Computational Physics 2021

We present a novel numerical method to solve the incompressible Navier-Stokes equations for two-phase flows with phase change. Separate phases are tracked using geometric Volume-Of-Fluid (VOF) piecewise linear interface construction (PLIC). Thermal energy advection is treated in conservative form and calculation of VOF fluxes at computational cell boundaries used consistently calculate heat cap...

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