Zobrazeno 1 - 10
of 91
pro vyhledávání: '"David L. Whitfield"'
Autor:
Daniel Hyams, W. Roger Briley, Ramesh Pankajakshan, Kidambi Sreenivas, D. Stephen Nichols, David L. Whitfield
Publikováno v:
Computers & Fluids. 41:27-40
Numerical solutions of the unsteady Reynolds-averaged Navier–Stokes equations using a parallel implicit flow solver are given to investigate unsteady aerodynamic flows affecting the fuel economy of Class 8 trucks. Both compressible and incompressib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12383030038d50f5f3941798b97e05fb
https://doi.org/10.1016/j.compfluid.2010.09.015
https://doi.org/10.1016/j.compfluid.2010.09.015
Publikováno v:
The Aerodynamics of Heavy Vehicles III ISBN: 9783319201214
Full scale CFD simulations of the Generic Conventional Model (GCM), a simplified model of a Class 8 truck, were used to explore passive devices for improving the drag performance of the trailer base. Significant improvements over conventional straigh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6d767818a4b5dc9baa0b609d2941f27
https://doi.org/10.1007/978-3-319-20122-1_14
https://doi.org/10.1007/978-3-319-20122-1_14
Publikováno v:
Journal of Aircraft. 40:566-573
A multidisciplinary sensitivity analysis technique based on a complex Taylor series expansion method is implemented. This technique is shown to be independent of step-size selection as it pertains to cancellation errors. The primary focus of this res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdf28999dc8dddd25eba2bef80aeac4f
https://doi.org/10.2514/2.3131
https://doi.org/10.2514/2.3131
Publikováno v:
Journal of Computational Physics. 184:79-105
A characteristic-based unsteady viscous flow solver is developed with preconditioning that is uniformly applicable for Mach numbers ranging from essentially incompressible to supersonic. A preconditioned flux-difference formulation for nondimensional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4af752120c08e902379e4c8164eed11
https://doi.org/10.1016/s0021-9991(02)00018-9
https://doi.org/10.1016/s0021-9991(02)00018-9
Publikováno v:
AIAA Journal. 39:56-63
The use of complex variables for determining sensitivity derivatives for turbulent flows is examined. Although a step size parameter is required, the numerical derivatives are not subject to subtractive cancellation errors and, therefore, exhibit tru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90d4ab61f1f8e2d03f663e47a2d361f5
https://doi.org/10.2514/3.14697
https://doi.org/10.2514/3.14697
Publikováno v:
AIAA Journal. 37:169-176
A multiblock approach is presented for solving two-dimensional incompressible turbulent flows on unstructured grids. The artificial compressibility form of the governing equations is solved by a vertex-centered, finite-volume implicit scheme which us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbd804ef8742142da54b594811cc4435
https://doi.org/10.2514/2.710
https://doi.org/10.2514/2.710
Publikováno v:
Journal of Propulsion and Power. 15:64-72
A technique for the simulation of unsteady flows in and around complex rotating machinery is presented. Additional domain decomposition mechanisms are introduced which extend the range of applicability of software developed for the time-accurate simu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc2b1790c9991c53652b166e48a580d0
https://doi.org/10.2514/2.5392
https://doi.org/10.2514/2.5392
Autor:
David L. Whitfield, Kidambi Sreenivas
Publikováno v:
AIAA Journal. 36:968-975
Linearized Euler solvers based on a high-resolution numerical scheme are presented. The approach is to linearize the numerical-flux vector as opposed to carrying through the complete linearization analysis with the dependent-variable vector written a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89c419ce45e4c558d754a512836ba905
https://doi.org/10.2514/2.466
https://doi.org/10.2514/2.466
Publikováno v:
Applied Mathematics and Computation. 89:67-84
The previously reported Modified Artificial Compressibility approach to solve unsteady, two dimensional free surface flows using Euler equations has been extended to solve unsteady, three dimensional free surface flows using Navier-Stokes equations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57446645fb3c2a7ae47688065b0a8e00
https://doi.org/10.1016/s0096-3003(97)81648-7
https://doi.org/10.1016/s0096-3003(97)81648-7
Publikováno v:
Journal of Computational Physics. 128:32-42
A lower-upper/approximate-factorization (LU/AF) scheme is developed for the incompressible Euler or Navier?Stokes equations. The LU/AF scheme contains an iteration parameter that can be adjusted to improve iterative convergence rate. The LU/AF scheme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b72a4f925f900ea3c2c8f080a6586511
https://doi.org/10.1006/jcph.1996.0194
https://doi.org/10.1006/jcph.1996.0194