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
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
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
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
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
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
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
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.
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