Results 91 to 100 of about 10,991,666 (202)

Potential of chaotic iterative solvers for CFD

Computational Fluid Dynamics (CFD) has enjoyed the speed-up available from supercomputer technology advancements for many years. In the coming decade, however, the architecture of supercomputers will change, and CFD codes must adapt to remain current ...
Vaz, G., Cox, S.J., Turnock, S.R., Hawkes, J., Phillips, A.B.   +4 more
core   +1 more source

A Refined Approach for Angle of Attack Estimation and Dynamic Force Hysteresis in H-Type Darrieus Wind Turbines

Energies
This study investigates the aerodynamic performance and flow dynamics of an H-type Darrieus vertical axis wind turbine (VAWT) using combined numerical and experimental methods.
Jan Michna, Krzysztof Rogowski
doaj   +1 more source

Comparative investigation of large eddy simulation and RANS approaches for external automotive flows [PDF]

, 2011
This thesis investigates the accuracy and scalability of RANS and LES approaches applied to external automotive aerodynamics. Due to the availability of considerable experimental and computational data available on the Ahmed body, this reference model
Brondolo, Luca
core  

Estimating pandemic vaccine effectiveness in two Italian regions using the screening method, 2009–2010

, 2012
The objective of this study, conducted within the I-MOVE project, was to estimate pandemic VE against laboratory confirmed cases in two Italian regions using the screening method. We calculated vaccine coverage using the number of first doses of pandemic
Bella A., Sambri V., ), Donatelli I., Rizzo C., the screening method working group, Puzelli S., Seyler T.   +7 more
core   +1 more source

Numerical Investigation of Oblique Currents’ Effects on the Hydrodynamic Characteristics of Ships in Restricted Waters

Journal of Marine Science and Engineering
The influence of oblique currents in narrow and shallow channels causes the fluid flow around ships to become complex. To analyze the hydrodynamic characteristics of a ship in such channels, it is essential to examine the influence of oblique currents on
Yilin Huang, Da Hui, Mingyu Xia, Guangyao Wang, Jinshan Zhu   +4 more
doaj   +1 more source

Unsteady loading on the propeller at different maneuvering conditions using hybrid and urans methods

, 2015
The results of computations of the unsteady wake and unsteady loadings on marine propellers behind the KVLCC2 tanker model under simple manoeuver conditions (only drift angle) and complete manoeuvring (drift angle and yaw rate) using different numerical methods are presented and analysed. The hybrid URANS-LES model presented in [1, 2], the hybrid IDDES
Abbas, Nawar, Kornev, Nikolai
openaire   +1 more source

Approximate Transition Prediction for the ONERA 7AD Rotor in Forward Flight using a Structured and Unstructured URANS solver

, 2016
The simulation capabilities of the URANS solvers TAU and FLOWer of DLR have been extended in order to predict the laminar-turbulent transition onset on helicopter rotors.
Heister, Christoph
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Two-scale methods for LES/URANS

A common challenge in CFD simulations for both external and internal flows is in the near-wall region for wall-bounded turbulent flows. Fully wall-resolved LES (WRLES) solutions tend to be very costly particularly at realistically high Reynolds numbers, whilst wall-modeled LES (WMLES) are subject to considerable empiricism, further challenged by more ...
openaire   +1 more source

A Numerical Simulation of Turbulence Flow around a Blade Profile of HAWT Rotor in Moving Pulse

Journal of Applied Fluid Mechanics, 2012
A computation of three-dimensional flow past an isolated NACA0012 airfoil using Reynolds-averaged Navier -stokes equations (RANS) method is conducted. Tow closure models k-ε and SST are applied to the numerical prediction of the turbulent flow.
N. Belkheir, R. Dizene, S. Khelladi
doaj  

The simulation of turbulent flow with a suction behind the bar on the basis of hybrid LES/URANS-approach

, 2014
Нестационарный трехмерный турбулентный поток несжимаемой жидкости над прямоугольной двумерной преградой с отсосом на плоской пластине в пограничном слое численно исследуется, используя гибридный LES/URANS-подход, пристенные модели и конечно-разностный ...
Кузьменко, В.Г.
core