نتایج جستجو برای: cfd modeling

تعداد نتایج: 401752  

Journal: :Journal of biomechanical engineering 2008
Matthew D Ford Hristo N Nikolov Jaques S Milner Stephen P Lownie Edwin M Demont Wojciech Kalata Francis Loth David W Holdsworth David A Steinman

Computational fluid dynamics (CFD) modeling of nominally patient-specific cerebral aneurysms is increasingly being used as a research tool to further understand the development, prognosis, and treatment of brain aneurysms. We have previously developed virtual angiography to indirectly validate CFD-predicted gross flow dynamics against the routinely acquired digital subtraction angiograms. Towar...

Journal: :International Journal of Molecular Sciences 2008
Yiqun Wang Lifeng Yan

Thermochemical conversion of biomass offers an efficient and economically process to provide gaseous, liquid and solid fuels and prepare chemicals derived from biomass. Computational fluid dynamic (CFD) modeling applications on biomass thermochemical processes help to optimize the design and operation of thermochemical reactors. Recent progression in numerical techniques and computing efficacy ...

2010
Ishtiaq A. Chaudhry M. R. Mirza M. J. Rashid

The innovation in software analysis and various available programming facilities have urged the designers at various levels to do indispensable calculations for engine flows. Presently, the 3-D analysis approach is under practice to do simulations for various parameters involving engine operations using various softwares, “Fluent” being the trendiest at the moment for CFD modeling. The present ...

2001

Extensive testing with a plasma torch operating on methane in a supersonic crossflow sparked an interest in modeling the torch using CFD to determine if methane plasma jets can be accurately modeled, and if so, to ascertain the usefulness of such results. The comparison presented here is of a methane plasma jet produced by a normally oriented plasma torch in a Mach 2.4 crossflow and the corresp...

A multi-objective optimization (MOO) of two-element wing models with morphing flap by using computational fluid dynamics (CFD) techniques, artificial neural networks (ANN), and non-dominated sorting genetic algorithms (NSGA II), is performed in this paper. At first, the domain is solved numerically in various two-element wing models with morphing flap using CFD techniques and lift (L) and drag ...

2013
Christopher M. Boyce Daniel J. Holland Stuart A. Scott John S. Dennis

Discrete element modeling is being used increasingly to simulate flow in fluidized beds. These models require complex measurement techniques to provide validation for the approximations inherent in the model. This paper introduces the idea of modeling the experiment to ensure that the validation is accurate. Specifically, a 3D, cylindrical gas-fluidized bed was simulated using a discrete elemen...

2011
Andrew R. Crowell Jack J. McNamara Brent A. Miller

Computational Fluid Dynamic (CFD) surrogates are developed to efficiently compute the aerodynamic heating and unsteady pressure loads for a structurally and thermally compliant skin panel in hypersonic flow. In order to minimize the computational overhead, the surrogates are constructed using steady-state CFD flow analysis. Unsteady terms in the aerodynamic pressure are incorporated using pisto...

2005
Costas Pontikakos Konstantinos P. Ferentinos Theodore Tsiligiridis

In this work a model to estimate the efficiency of natural ventilation in a commercial twin-span greenhouse is presented. A numerical simulation approach was adopted using the theory of three-dimensional computational fluid dynamics (CFD). With this approach, it was able to generate three-dimensional patterns for temperature and airspeed inside the greenhouse, using specific boundary conditions...

2010
Meiring Beyers Thomas Harms Johan Stander

The elevated and aerodynamically streamlined South African Antarctic research base SANAE IV, in Queen Maud Land, off the Fimbul ice-shelf in Antarctica, exhibits unique wind driven snow drift formations. The longitudinal snowdrifts that form behind the interconnecting links that join the elevated research buildings are approximately 4 m high, 15 m wide and 60 m long are annually removed during ...

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