Journal ArticleDOI
Evaluation of Jameson-Schmidt-Turkel dissipation scheme for hypersonic flow computations
Reads0
Chats0
TLDR
In this paper, the use of the Jameson-Schmidt-Turkel (JST) dissipation scheme is successfully extended to compute hypersonic flows over an airfoil.Abstract:
In the present work, the use of the Jameson-Schmidt-Turkel (JST) dissipation scheme is successfully extended to compute hypersonic flows over an airfoil. It is shown that this scheme is not only capable of computing flows at speeds all the way up to Mach 50, but also the rate of convergence and the final results are as good as those obtained using the Swanson-Turkel modification of the JST scheme and better than the Yoon-Kwak flux limited dissipation specially designed to compute high-speed flows. The scheme is seen to be so robust that it does not require a well-prepared starting solution to compute flows with either strong shocks or with high incidence, or both.read more
Citations
More filters
Journal ArticleDOI
A shock-detecting sensor for filtering of high-order compact finite difference schemes
TL;DR: A new shock-detecting sensor for properly switching between a second-order and a higher-order filter is developed and assessed and a suitable scaling is proposed to have dissipation proportional to the shock strength and also to minimize the effects of the second- order filter on the very small scales.
DissertationDOI
The simulation of turbomachinery flows at arbitrary Mach numbers and the analysis of leakage flows in shrouded axial turbines
TL;DR: In this article, a preconditioned solution scheme for the simulation of turbomachinery flow at arbitrary Mach numbers is presented, where four dissipation schemes have been developed and adapted for the use in combination with pre-conditioning.
Journal ArticleDOI
A More Robust Compressible Lattice Boltzmann Model by using the Numerical Filters
Mohsen Ghadyani,Vahid Esfahanian +1 more
TL;DR: The accuracy and robustness of the utilized LB models are improved for inviscid compressible flows by implementation of the numerical filters on primitive variables by demonstrating that the proposed complementary scheme is practical.
Journal ArticleDOI
Accuracy improvement of second-order central scheme using smart post-process filter for hybrid RANS/LES method
Reza Pasandeh,Vahid Esfahanian +1 more
TL;DR: In this article, an unsteady compressible 3D coupled RANS/LES solver using two-equation turbulence model is developed, and a smart post-processing filter is also embedded as the dissipation term in the code to maintain both the stability and the accuracy.
Journal ArticleDOI
Accelerated and robust finite volume Navier-Stokes solver for all speeds
TL;DR: The computed results are in very good agreement with experimental data where available, especially from the point of view of predicting large suction peaks and shock locations where considerable departures are often seen in the literature.
References
More filters
Numerical solution of the Euler equations by finite volume methods using Runge Kutta time stepping schemes
TL;DR: In this paper, a new combination of a finite volume discretization in conjunction with carefully designed dissipative terms of third order, and a Runge Kutta time stepping scheme, is shown to yield an effective method for solving the Euler equations in arbitrary geometric domains.
Proceedings ArticleDOI
Thin-layer approximation and algebraic model for separated turbulent flows
B. Baldwin,H. Lomax +1 more
TL;DR: In this article, an algebraic turbulence model for two-and three-dimensional separated flows is specified that avoids the necessity for finding the edge of the boundary layer, and compared with experiment for an incident shock on a flat plate, separated flow over a compression corner, and transonic flow over an airfoil.
Journal ArticleDOI
On Central-Difference and Upwind Schemes
R. C. Swanson,Eli Turkel +1 more
TL;DR: In this paper, a class of numerical dissipation models for central-difference schemes constructed with second and fourth difference terms is considered, where the notion of matrix dissipation associated with upwind schemes is used to establish improved shock capturing capability for these models.
A cell-vertex multigrid method for the Navier-Stokes equations
TL;DR: It is shown that the solutions for three-dimensional flows with strong separations can be dramatically improved, when a nonequilibrium model of turbulence is used.