Showing papers in "Computers & Fluids in 2011"

TL;DR: ‘Closed-loop’ optimization can be performed through frequent repetition of the optimization during the producing life of the field in combination with updating the of the model coefficients based on production measurements.

TL;DR: The present work aims to address and validate new algorithms to efficiently predict the hemodynamics in large arteries using finite elements simulation of the fluid–structure interaction between blood flow and arterial wall deformation of a healthy aorta.

TL;DR: In this article, the effect of cone tip-diameter on the flow field and performance of cyclone separator was investigated computationally and via mathematical models using large eddy simulation (LES).

TL;DR: A high-performance computing framework for advanced flow simulation and its application to wind energy based on the residual-based variational multiscale (RBVMS) method and isogeometric analysis is presented.

TL;DR: In this article, the effect of internal mass in the simulation of a moving body by the immersed boundary method was investigated, and it was found that the internal mass effect is significant to unsteady body motions for the Reynolds numbers over 10 and grows as the Reynolds number increases.

TL;DR: In this paper, a mathematical model was developed to study the heat transfer characteristics occurring during the melting process due to a stretching/shrinking sheet, and the transformed non-linear ordinary differential equations governing the flow were solved numerically by the Runge-Kutta-Fehlberg method with shooting technique.

TL;DR: In this paper, an improved low diffusion E-CUSP (LDE) scheme is presented, which can capture crisp shock profile and exact contact surface, and several numerical cases are presented to demonstrate the accuracy and robustness of the new scheme.

TL;DR: Self-propulsion computations of the KCS containership are performed in full-scale with direct discretization of the propeller, and it is concluded that the propellers operates more efficiently in full scale and is subject to smaller load fluctuations.

TL;DR: In this article, a 3D prismatic tank with different ring baffle arrangements (e.g., height, width, etc.) was further investigated under near-resonant excitations of surge and pitch motions.

TL;DR: A computational methodology is presented to obtain a model reduction of the steady compressible Reynolds-Averaged Navier–Stokes equations with a high-dimensional parameter space that allows a dynamic building of surrogate models for aerodynamic flight data generation and for multidisciplinary design optimization with a small number of full numerical flow simulations.

TL;DR: An unsteady high order Discontinuous Galerkin (DG) solver that has been developed, verified and validated for the solution of the two-dimensional incompressible Navier–Stokes equations is presented.

TL;DR: In this paper, the effect of the wavy leading edge on hydrodynamic characteristics for the flow of rectangular wings with the low aspect ratio of 1.5 at one Reynolds number of 106 based on free stream velocity and the chord length C.

TL;DR: In this paper, the similarity solution for the MHD Hiemenz flow against a flat plate with variable wall temperature in a porous medium gives a system of nonlinear partial differential equations, which are solved analytically by using a novel analytical method (DTM-Pade technique).

TL;DR: In this paper, various vortex generators were investigated under normal shock conditions with a diffuser at Mach number of 1.3, and it was found that a height of about half the boundary thickness and a large trailing edge gap yielded a fully attached flow downstream of the device.

TL;DR: In this paper, two approaches to finite difference approximation of turbulent flows of electrically conducting incompressible fluids in the presence of a steady magnetic field are analyzed, one based on high-order approximations and up-biased discretization of the nonlinear term, and another consistent of the second order and nearly fully conservative in regard of mass, momentum, kinetic energy, and electric charge conservation principles.

TL;DR: This work examines how careful selection of the strategy minimises computational cost across a range of polynomial orders in three dimensions and compares how different operators, and the choice of element shape, lead to different break-even points between the implementations.

TL;DR: In this paper, the authors present a computational study of the separated flow in a planar asymmetric diffuser using the steady RANS equations for turbulent incompressible fluid flow and six turbulence closures.

TL;DR: These new findings provide additional evidence to Leal's conclusion that the appearance of recirculating wakes at finite Reynolds number is due to vorticity accumulation, but not a result of the same physical phenomena associated with separation in boundary layers in adverse pressure gradients.

TL;DR: An initial jet-pump design was developed using an analytical approach and its efficiency was improved using an efficient and accurate computational fluid dynamics model of the compressible turbulent flow in the pump, whose predictions agreed well with corresponding experimental data.

TL;DR: In this article, a variational multiscale large-eddy simulations (VMS-LES) of the flow around a circular cylinder are carried out at different Reynolds numbers in the subcritical regime, viz. Re-=−3900, 10,000 and 20,000, based on the cylinder diameter.

TL;DR: A one-step high-order cell-centered numerical scheme for solving Lagrangian hydrodynamics equations on unstructured grids using the sub-cell force concept invoking conservation and thermodynamic consistency is presented.

TL;DR: The proposed methods are validated through convective heat transfer problems with not only stationary but also moving boundaries – the natural convection in a square cavity with an eccentrically located cylinder and a cold particle sedimentation in an infinite channel.

TL;DR: In this article, a complete Arbitrary Lagrangian Eulerian (ALE) strategy devoted to the computation of multi-material fluid flows using the volume of fluid (VOF) interface reconstruction method applied to plasma physics and inertial confinement fusion (ICF) is presented.

TL;DR: In this article, a high-order spectral difference (SD) method was used to simulate unsteady flow past plunging and pitching airfoils using unstructured quadrilateral grids for the plunging airfoil at low Reynolds number.

TL;DR: In this article, a detailed analysis is conducted of the influence of the so-called venturi effect and the wind blocking effect on the aerodynamic performance of a venturishaped roof (called VENTEC roof).

TL;DR: In this article, a Zonal Detached Eddy Simulation (ZDES) is presented to simulate a spatially developing turbulent boundary layer over a smooth flat plate at Reθ = 2900.

TL;DR: This work reports one of the first large-eddy simulation in this class of flows, where a structured cylindrical coordinate solver with optimal conservation properties is utilized in conjunction with an immersed-boundary method.

TL;DR: In this article, a two-layer Newtonian fluid model consisting of an upper mucus layer and a lower periciliary layer (PCL) is developed to simulate the muco-ciliary transport process.

TL;DR: Numerical results of some test cases proposed within the EU ADIGMA (Adaptive Higher-Order Variational Methods for Aerodynamic Applications in Industry) project demonstrate the capabilities of the Discontinuous Galerkin solver method.

TL;DR: 2-dimensional calculations of elliptical drop evolution and dam break flow have been carried out by the GPU-accelerated MPS method, and the accuracy and performance of GPU-based code are investigated by comparing the results with those by CPU.