Ghost Fluid Method for Strong Shock Interactions Part 1: Fluid-Fluid Interfaces

AIAA Journal ◽  
2009 ◽  
Vol 47 (12) ◽  
pp. 2907-2922 ◽  
Author(s):  
Shiv Kumar Sambasivan ◽  
H. S. UdayKumar
Keyword(s):  
Strong Shock ◽  
Fluid Interfaces ◽  
Ghost Fluid Method ◽  
Shock Interactions

Ghost Fluid Method for Strong Shock Interactions Part 2: Immersed Solid Boundaries

AIAA Journal ◽  
2009 ◽  
Vol 47 (12) ◽  
pp. 2923-2937 ◽  
Author(s):  
Shiv Kumar Sambasivan ◽  
H. S. UdayKumar
Keyword(s):  
Strong Shock ◽  
Ghost Fluid Method ◽  
Shock Interactions

A Front Tracking Method for the Simulation of Compressible Multimedium Flows

2016 ◽  
Vol 19 (1) ◽  
pp. 124-142 ◽  
Author(s):  
Haitian Lu ◽  
Ning Zhao ◽  
Donghong Wang
Keyword(s):  
Compressible Flows ◽  
Water System ◽  
Front Tracking ◽  
Fluid Interfaces ◽  
Ghost Fluid Method ◽  
Riemann Solutions ◽  
Tracking Method ◽  
Front Tracking Method ◽  
Bubble Interaction ◽  
Interface Boundary Conditions

AbstractA front tracking method combined with the real ghost fluid method (RGFM) is proposed for simulations of fluid interfaces in two-dimensional compressible flows. In this paper the Riemann problem is constructed along the normal direction of interface and the corresponding Riemann solutions are used to track fluid interfaces. The interface boundary conditions are defined by the RGFM, and the fluid interfaces are explicitly tracked by several connected marker points. The Riemann solutions are also used directly to update the flow states on both sides of the interface in the RGFM. In order to validate the accuracy and capacity of the new method, extensive numerical tests including the bubble advection, the Sod tube, the shock-bubble interaction, the Richtmyer-Meshkov instability and the gas-water interface, are simulated by using the Euler equations. The computational results are also compared with earlier computational studies and it shows good agreements including the compressible gas-water system with large density differences.

Nonlinear Strong Shock Interactions: A Shock-Fitted Approach

1998 ◽  
Vol 11 (1) ◽  
pp. 1-29 ◽  
Author(s):  
G. Erlebacher ◽  
M.Y. Hussaini ◽  
T.L. Jackson
Keyword(s):  
Strong Shock ◽  
Shock Interactions

Unsteady Strong Shock Interactions in a Transonic Turbine: Experimental and Numerical Analysis

2008 ◽  
Vol 24 (4) ◽  
pp. 722-731 ◽  
Author(s):  
Guillermo Paniagua ◽  
Tolga Yasa ◽  
Adres de la Loma ◽  
Lionel Castillon ◽  
Thomas Coton
Keyword(s):  
Numerical Analysis ◽  
Strong Shock ◽  
Shock Interactions ◽  
Transonic Turbine

Modified Ghost Fluid Method as Applied to Fluid-Plate Interaction

2014 ◽  
Vol 6 (01) ◽  
pp. 24-48 ◽  
Author(s):  
Liang Xu ◽  
Tiegang Liu
Keyword(s):  
Elastic Plate ◽  
Strong Shock ◽  
Thin Elastic Plate ◽  
Specific Class ◽  
Time Step ◽  
Ghost Fluid Method ◽  
Acceleration Techniques ◽  
Interfacial States ◽  
Plate Coupling ◽  
Modified Ghost Fluid Method

AbstractThe modified ghost fluid method (MGFM) provides a robust and efficient interface treatment for various multi-medium flow simulations and some particular fluid-structure interaction (FSI) simulations. However, this methodology for one specific class of FSI problems, where the structure is plate, remains to be developed. This work is devoted to extending the MGFM to treat compressible fluid coupled with a thin elastic plate. In order to take into account the influence of simultaneous interaction at the interface, a fluid-plate coupling system is constructed at each time step and solved approximately to predict the interfacial states. Then, ghost fluid states and plate load can be defined by utilizing the obtained interfacial states. A type of acceleration strategy in the coupling process is presented to pursue higher efficiency. Several one-dimensional examples are used to highlight the utility of thismethod over looselycoupled method and validate the acceleration techniques. Especially, this method is applied to compute the underwater explosions (UNDEX) near thin elastic plates. Evolution of strong shock impacting on the thin elastic plate and dynamic response of the plate are investigated. Numerical results disclose that this methodology for treatment of the fluid-plate coupling indeed works conveniently and accurately for different structural flexibilities and is capable of efficiently simulating the processes of UNDEX with the employment of the acceleration strategy.

scholarly journals A Few Benchmark Test Cases for Higher-Order Euler Solvers

2017 ◽  
Vol 10 (4) ◽  
pp. 711-736 ◽  
Author(s):  
Liang Pan ◽  
Jiequan Li ◽  
Kun Xu
Keyword(s):  
Density Ratio ◽  
Strong Shock ◽  
Kinetic Scheme ◽  
Higher Order ◽  
Two Dimensions ◽  
Test Cases ◽  
Rarefaction Waves ◽  
Shock Interactions ◽  
Large Density Ratio ◽  
Set Up

AbstractThere have been great efforts on the development of higher-order numerical schemes for compressible Euler equations in recent decades. The traditional test cases proposed thirty years ago mostly target on the strong shock interactions, which may not be adequate enough for evaluating the performance of current higher-order schemes. In order to set up a higher standard for the development of new algorithms, in this paper we present a few benchmark cases with severe and complicated wave structures and interactions, which can be used to clearly distinguish different kinds of higher-order schemes. All tests are selected so that the numerical settings are very simple and any higher order scheme can be straightforwardly applied to these cases. The examples include highly oscillatory solutions and the large density ratio problem in one dimensional case. In two dimensions, the cases include hurricane-like solutions; interactions of planar contact discontinuities with asymptotic large Mach number (the composite of entropy wave and vortex sheets); interaction of planar rarefaction waves with transition from continuous flows to the presence of shocks; and other types of interactions of two-dimensional planar waves. To get good performance on all these cases may push algorithm developer to seek for new methodology in the design of higher-order schemes, and improve the robustness and accuracy of higher-order schemes to a new level of standard. In order to give reference solutions, the fourth-order gas-kinetic scheme (GKS) will be used to all these benchmark cases, even though the GKS solutions may not be very accurate in some cases. The main purpose of this paper is to recommend other CFD researchers to try these cases as well, and promote further development of higher-order schemes.

Ionization relaxation behind strong shock waves in gases

1970 ◽  
Vol 102 (11) ◽  
pp. 431-462 ◽  
Author(s):  
L.M. Biberman ◽  
A.Kh. Mnatsakanyan ◽  
I.T. Yakubov
Keyword(s):  
Shock Waves ◽  
Strong Shock ◽  
Strong Shock Waves

Characteristics of Two-Dimensional Radiation behind Strong Shock Waves in Air(1st Report) Total Radiation Emission.

1997 ◽  
Vol 45 (523) ◽  
pp. 453-457
Author(s):  
Toshihiro MORIOKA ◽  
Yoshiki MATSUURA ◽  
Nariaki SAKURAI ◽  
Jorge KOREEDA ◽  
Kazuo MAENO ◽  
...  
Keyword(s):  
Shock Waves ◽  
Strong Shock ◽  
Two Dimensional ◽  
Total Radiation ◽  
Radiation Emission ◽  
Strong Shock Waves
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