A comparative study of high-order variable-property segregated algorithms for unsteady low Mach number flows

2011 ◽  
Vol 66 (4) ◽  
pp. 403-427 ◽  
Author(s):  
R. Knikker
Keyword(s):  
Mach Number ◽  
Comparative Study ◽  
High Order ◽  
Low Mach Number ◽  
Variable Property ◽  
Order Variable

scholarly journals Efficient high-order discontinuous Galerkin computations of low Mach number flows

2018 ◽  
Vol 13 (2) ◽  
pp. 243-270 ◽  
Author(s):  
Jonas Zeifang ◽  
Klaus Kaiser ◽  
Andrea Beck ◽  
Jochen Schütz ◽  
Claus-Dieter Munz
Keyword(s):  
Mach Number ◽  
Discontinuous Galerkin ◽  
High Order ◽  
Low Mach Number

A high-order discontinuous Galerkin solver for low Mach number flows

2015 ◽  
Vol 81 (8) ◽  
pp. 489-520 ◽  
Author(s):  
B. Klein ◽  
B. Müller ◽  
F. Kummer ◽  
M. Oberlack
Keyword(s):  
Mach Number ◽  
Discontinuous Galerkin ◽  
High Order ◽  
Low Mach Number

scholarly journals A high-order spectral deferred correction strategy for low Mach number flow with complex chemistry

2016 ◽  
Vol 20 (3) ◽  
pp. 521-547 ◽  
Author(s):  
Will E. Pazner ◽  
Andrew Nonaka ◽  
John B. Bell ◽  
Marcus S. Day ◽  
Michael L. Minion
Keyword(s):  
Mach Number ◽  
High Order ◽  
Low Mach Number ◽  
Deferred Correction ◽  
Number Flow ◽  
Complex Chemistry ◽  
Spectral Deferred Correction ◽  
Low Mach Number Flow

Projection method for high-order compact schemes for low Mach number flows in enclosures

2014 ◽  
Vol 24 (5) ◽  
pp. 1141-1174 ◽  
Author(s):  
Artur Tyliszczak
Keyword(s):  
Mach Number ◽  
Boundary Conditions ◽  
Projection Method ◽  
High Order ◽  
Staggered Grid ◽  
Constant Density ◽  
Computational Domain ◽  
Content Type ◽  
Low Mach Number ◽  
Large Density

Purpose – Variable density flows play an important role in many technological devices and natural phenomena. The purpose of this paper is to develop a robust and accurate method for low Mach number flows with large density and temperature variations. Design/methodology/approach – Low Mach number approximation approach is used in the paper combined with a predictor-corrector method and accurate compact scheme of fourth and sixth order. A novel algorithm is formulated for the projection method in which the boundary conditions for the pressure are implemented in such a way that the continuity equation is fulfilled everywhere in the computational domain, including the boundary nodes. Findings – It is shown that proposed implementation of the boundary conditions considerably improves a solution accuracy. Assessment of the accuracy was performed based on the constant density Burggraf flow and for two benchmark cases for the natural convection problems: steady flow in a square cavity and unsteady flow in a tall cavity. In all the cases the results agree very well with exemplary solutions. Originality/value – A staggered or half-staggered grid arrangement is usually used for the projection method for both constant and low Mach number flows. The staggered approach ensures stability and strong pressure-velocity coupling. In the paper a high-order compact method has been implemented in the framework of low Mach number approximation on collocated meshes. The resulting algorithm is accurate, robust for large density variations and is almost free from the pressure oscillations.

A Comparative Study of Two Preconditioners for Solving 3D Inviscid Low Speed Flows

2011 ◽  
Vol 110-116 ◽  
pp. 423-430 ◽  
Author(s):  
Kazem Hejranfar ◽  
Ramin Kamali Moghadam
Keyword(s):  
Mach Number ◽  
Comparative Study ◽  
Euler Equations ◽  
Finite Volume ◽  
Eigenvalues And Eigenvectors ◽  
Flow Solver ◽  
Low Mach Number ◽  
Euler Flow ◽  
A Cell ◽  
And Performance

In the present study, two preconditioners proposed by Eriksson, and Choi and Merkel are implemented on a 3D upwind Euler flow solver on unstructured meshes. The mathematical formulations of these preconditioning schemes for the set of primitive variables are drawn and their eigenvalues and eigenvectors are compared with each others. A cell-centered finite volume Roe's method is used for discretization of the 3D preconditioned Euler equations. The accuracy and performance of these preconditioning schemes are examined by computing low Mach number flows over the ONERA M6 wing for different conditions.

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