The goal of this paper is to derive the von Neumann stability conditions for the pressure-based solution scheme, semi-implicit method for pressure-linked equations (SIMPLE). The SIMPLE scheme lies at the heart of a class of computational fluid dynamics (CFD) algorithms built into several commercial and open-source CFD software packages. To the best of the authors' knowledge, no readily usable stability guidelines appear to be available for this popularly employed scheme. The Euler equations are examined, as the inclusion of viscosity in the Navier–Stokes (NS) equation serves to only soften the stability limits. First, the one-dimensional (1D) Euler equations are studied, and their stability properties are delineated. Next, a rigorous stability analysis is carried out for the two-dimensional (2D) Euler equations; the analysis of the 2D equations is considerably more challenging as compared to analysis of the 1D form of equations. The Euler equations are discretized using finite differences on a staggered grid, which is used to achieve equivalence to finite-volume discretization. Error amplification matrices are determined from the stability analysis, stable and unstable regimes are identified, and practical stability limits are predicted in terms of the maximum allowable Courant–Friedrichs–Lewy (CFL) number as a function of Mach number. The predictions are verified using the Riemann problem, and very good agreement is obtained between the analytically predicted and the “experimentally” observed CFL values. The successfully tested stability limits are presented in graphical form, as compared to complicated mathematical expressions often reported in published literature. Since our analysis accounts for the solution scheme along with the full system of flow equations, the conditions reported in this paper offer practical value over the conditions that arise from analysis of simplified 1D model equations.
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October 2016
Research-Article
von Neumann Stability Analysis of a Segregated Pressure-Based Solution Scheme for One-Dimensional and Two-Dimensional Flow Equations
Santosh Konangi,
Santosh Konangi
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: konangsh@mail.uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: konangsh@mail.uc.edu
Search for other works by this author on:
Nikhil K. Palakurthi,
Nikhil K. Palakurthi
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: palakunr@ucmail.uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: palakunr@ucmail.uc.edu
Search for other works by this author on:
Urmila Ghia
Urmila Ghia
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: urmila.ghia@uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: urmila.ghia@uc.edu
Search for other works by this author on:
Santosh Konangi
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: konangsh@mail.uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: konangsh@mail.uc.edu
Nikhil K. Palakurthi
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: palakunr@ucmail.uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: palakunr@ucmail.uc.edu
Urmila Ghia
Department of Mechanical
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: urmila.ghia@uc.edu
and Materials Engineering,
University of Cincinnati,
598 Rhodes Hall,
P.O. Box 210072,
Cincinnati, OH 45221-0072
e-mail: urmila.ghia@uc.edu
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 27, 2015; final manuscript received November 23, 2015; published online July 13, 2016. Assoc. Editor: Francine Battaglia.
J. Fluids Eng. Oct 2016, 138(10): 101401 (18 pages)
Published Online: July 13, 2016
Article history
Received:
August 27, 2015
Revised:
November 23, 2015
Citation
Konangi, S., Palakurthi, N. K., and Ghia, U. (July 13, 2016). "von Neumann Stability Analysis of a Segregated Pressure-Based Solution Scheme for One-Dimensional and Two-Dimensional Flow Equations." ASME. J. Fluids Eng. October 2016; 138(10): 101401. https://doi.org/10.1115/1.4033958
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