CAD models from conceptual design often follow the “over-the-wall” approach for downstream analyses such as FEA, CFD, heat transfer, and vibrations. The CAD-centric approach consists of using the CAD model as a source of data for downstream applications such as mesh generation, and CFD setup. The CAD model used in the CAD-centric approach contains the geometry to be analyzed and all non-geometr...

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 ...

In this paper, the heat pipe heat exchanger (HPHE) is considered and computational fluid dynamics (CFD) is used to analyze its evaporator’s performance and based on it, will be try to increase the thermal efficiency and to optimize the distribution of fluid flow in this type of heat exchangers. The CFD principles which are made use in this article are effective and appropriate methods that usin...

PURPOSE The authors present a patient with Marfan syndrome who underwent cataract surgery using a novel device for fixation of capsular bag. METHODS The capsule fixation device (CFD) is poly(methyl methacrylate) arch with double-armed bent hook that can be introduced into the anterior chamber through the clear corneal incision, placed with a rest on the capsule equator, and sutured to the scl...

Clinical trials have shown that functional assessment of coronary stenosis by fractional flow reserve (FFR) improves clinical outcomes. Intravascular ultrasound (IVUS) complements conventional angiography, and is a powerful tool to assess atherosclerotic plaques and to guide percutaneous coronary intervention (PCI). Computational fluid dynamics (CFD) simulation represents a novel method for the...

This paper describes recent research on flapping-wing micro air vehicles, based on insect-like aerodynamics. A combined analytical, experimental and CFD approach is being adopted to understand and design suitable wing aerodynamics and kinematics. The CFD has used the Fluent 6 commercial code together with the grid-generating software Gambit 2; the experiments have been conducted in air and wate...

Aerospace engineers have always been leading in the field of design using computational simulations. We design vehicles that go fast, fly high, and operate in extreme conditions. Because computation can help reduce expensive tests that physically simulate these extreme conditions, we benefit from computational simulation and design. This is why successful aerospace companies and agencies, such ...

Ideally, Validation and Verification methods to be used to deliver Predictive Computational Fluid Dynamics (P-CFD) methods for design use, must utilize a consistent set of detailed input to perform an output response comparison to associated data that can accurately characterize the uncertainty in the calculated results. In this paper, some experimental efforts are described and discussed in re...

A CFD (Computational Fluid Dynamics) benchmark calculation for a steam blowdown test was performed for 30 seconds to develop the methodology for a numerical analysis of the thermal mixing between steam and subcooled water and to apply it to APR1400 (Advanced Power Reactor 1400MWe). In the CFD analysis, the steam condensation phenomenon by a direct contact was simulated by the so-called condensa...

A new far-field closure condition for a CFD-based numerical wave tank that uses a potential wave solution to overlay the outer computational domain of a CFD solution is described. A prescribed potential wave solution covers the region beyond a diameter more than 10 times of floater footprints. The diffracted waves from the body are absorbed by the ‘potential-attractor’ terms applied in the inte...