Searched for:
(1 - 20 of 173)

Pages

document
Den Hartog, J.P. (author), Koutamanis, A. (author)
conference paper 2000
document
Yoo, Jaehoon (author), Kim, Hyoung Tae (author)
journal article 2006
document
Li, A. (author), Norinaga, K. (author), Deutschmann, O. (author)
Numerical simulation of materials synthesis based on detailed models for the chemical kinetics and transport processes is expected to support development and optimization of production processes. Exemplarily, chemical vapor deposition and infiltration of pyrolytic carbon for the production of carbon fiber reinforced carbon is studied by recently...
conference paper 2006
document
Turunen-Saaresti, T. (author), Tang, J. (author), Larjola, J. (author)
Polynomial functions are generated to describe real gas properties in computational fluid dynamics (CFD). Two-variable relative least square fitting is applied. In this way the real gas model can be generated fast and easily and the computational time requested is small and precision of the function can be easily adjusted. In this paper this...
conference paper 2006
document
Othmer, C. (author), Kaminski, T. (author), Giering, R. (author)
Topology optimization of fluid dynamical systems is still in its infancy, with its first academic realizations dating back to as late as three years ago. In this paper, we present two approaches to fluid dynamic topology optimization that are based on potential flows and adjoint states, respectively. Special emphasis is paid to the computation...
conference paper 2006
document
Wild, J. (author), Brezillon, J. (author), Mertins, R. (author), Quagliarella, D. (author), Germain, E. (author), Amoignon, O. (author), Moens, F. (author)
The design activity within the EUROLIFT II project is targeted towards an improvement of the take-off performance of a generic transport aircraft configuration by a re-design of the trailing edge flap. The involved partners applied different optimization strategies as well as different types of flow solvers in order to cover a wide range of...
conference paper 2006
document
Turkel, E. (author), Vatsa, V.N. (author), Swanson, R.C. (author), Rossow, C.C. (author)
We consider a multistage algorithm to advance in pseudo-time to find a steady state solution for the compressible Navier-Stokes equations. The rate of convergence to the steady state is improved by using an implicit preconditioner to approximate the numerical scheme. This properly addresses the stiffness in the discrete equations associated with...
conference paper 2006
document
Kumano, T. (author), Jeong, S. (author), Obayashi, S. (author), Ito, Y. (author), Hatanaka, K. (author), Morino, H. (author)
A Multidisciplinary Design Optimization (MDO) system for a wing with nacelle and pylon is developed. The present MDO system is based on the integration of Computational Fluid Dynamics (CFD) codes and NASTRAN based an aeroelastic-structural interface code. The Kriging model is employed to save the computational time of objective function...
conference paper 2006
document
Steijl, R. (author), Barakos, G.N. (author), Badcock, K.J. (author)
The focus of this paper is on the parallel computing aspects of multi-physics CFD methods and the implications for the design of a CFD framework encompassing mesh-based and particle-based approaches. In the first part of the paper, the shared-memory parallelisation of a multi-block, structured CFD is described and the parallel performance of...
conference paper 2006
document
Mirzaei, M. (author), Roshanian, J. (author), Nasrin Hosseini, S. (author)
A gradient based method is presented for optimization of an airfoil configuration. The flow is governed by two dimensional, compressible Euler equations. A finite volume code based on unstructured grid is developed to solve the equations. The procedure is carried out for optimizing an airfoil with initial configuration of NACA 0012. The...
conference paper 2006
document
Ono, C. (author), Furusawa, H. (author), Tamura, Y. (author)
In this paper, a simple analysis method for flow simulations around a motor cycle is discussed based on CFD. In the practical CFD, most of the efforts are wasted for grid generations. The typical two types of grid are body-fitted grid and Cartesian grid. Body-fitted grid was often used for the flow calculation around the vehicle until today....
conference paper 2006
document
Sandberg, R.D. (author), Sandham, N.D. (author)
This paper presents two-dimensional direct numerical simulations (DNS) of noise generated at trailing edges (TE) with zero thickness. The simulations are conducted specifying either no-slip or slip walls in order to investigate viscous effects. In both cases, small amplitude disturbances are introduced close to the inflow boundary that serve as...
conference paper 2006
document
Weinman, K.A. (author), Van der Ven, H. (author), Mockett, C.R. (author), Knopp, T.A. (author), Kok, J.C. (author), Perrin, R.T.E. (author), Thiele, F.H. (author)
A systematic grid convergence study is conducted for the Detached-Eddy Simulation (DES) of the massively separated flow around a NACA0021 airfoil at high angle of attack. In order to study the convergence characteristics of DES/LES problems, velocity fields using a series of grids must be generated that demonstrate sufficient dynamic similarity...
conference paper 2006
document
Sandberg, R.D. (author), Jones, L.E. (author), Sandham, N.D. (author)
This paper presents a non-reflecting boundary condition that significantly reduces the spurious pressure oscillations that are produced when vortical structures in a compressible flow cross the computational farfield boundaries. The method is based on commonly used characteristic boundary conditions. Here, incoming characteristics are ramped to...
conference paper 2006
document
Cebula, A. (author), Sobota, T. (author)
Local heat transfer from a cylinder in tube bank has been extensively studied. In many applications such as design of heat exchangers, detailed information regarding the circumferential and longitudinal variation of heat transfer to a cylinder is required. There are many different methods for measuring local heat transfer like techniques using...
conference paper 2006
document
Braza, M. (author), El Akoury, R. (author), Martinat, G. (author), Hoarau, Y. (author), Harran, G. (author), Chassaing, P. (author)
This paper analyses the performances of adapted URANS and DES turbulence^modelling for high-Reynolds 2D and 3D aerodynamic flows with a pronounced periodic character. The flow configurations is the NACA0012 airfoil in pitch (experimental test-case by Mc Croskey & Mc Alistair, 1976) at Reynolds number 0.98x10^6, as well as the inherently unsteady...
conference paper 2006
document
Freitas, G.C.S. (author), Peixoto, F.C. (author), Vianna, A.S. (author)
Thermal batteries are primary disposable systems specially designed to develop a high energy density in during a short period. Differently from the classical electrochemical systems, the electrolyte of such batteries is solid at room temperature, which make them inert until they are heated to high temperatures (around 500ÂșC), when the...
conference paper 2006
document
Hassani, K. (author), Navidbakhsh, M. (author), Rostami, M. (author)
By using CFD method, Fluent code , Aneurysm of specific locations of aorta artery have been simulated .For ascending, descending and abdominal aorta, aneurysm of different sizes and diameters are modeled. Geometrical data of aorta's sections have been extracted from physiological texts. Locations of hypothetical aneurysms are placed in the...
conference paper 2006
document
Shapiro, E. (author), Drikakis, D. (author), Gargiuli, J. (author), Vadgama, P. (author)
Dual-fluid flows are utilised extensively in microfluidics applications. A problem of particular interest isthe precise positioning of the contact discontinuity between the carrier fluids. The paper presents a computational study of the interface positioning in xylene/water flows used in polymer membrane fabrication in microfluidics. Both...
conference paper 2006
document
Meeks, E. (author), Chou, C.P. (author)
In the past decade, the computational fluid dynamics (CFD) community has put increasing attention on incorporating complex chemistry and physics into CFD simulations. However, for many practicing engineers today there is still much lacking in the effectiveness of reacting-flow simulation. Particularly in the area of combustion, the results can...
conference paper 2006
Searched for:
(1 - 20 of 173)

Pages