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

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

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

Numerical and experimental investigation of double-cone shock interactions

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 2268-2276
Author(s):  
M. J. Wright ◽  
K. Sinha ◽  
J. Olejniczak ◽  
G. V. Candler ◽  
T. D. Magruder ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Double Cone ◽  
Shock Interactions

A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension

2019 ◽  
Vol 12 (4) ◽  
pp. 357-366
Author(s):  
Yong Song ◽  
Shichuang Liu ◽  
Jiangxuan Che ◽  
Jinyi Lian ◽  
Zhanlong Li ◽  
...  
Keyword(s):  
Strong Shock ◽  
Artificial Muscle ◽  
Suspension System ◽  
Vehicle Body ◽  
Vehicle Suspension ◽  
Pneumatic Artificial Muscle ◽  
Advantages And Disadvantages ◽  
Road Excitation ◽  
Vehicle Suspension System ◽  
Suspension Structure

Background: Vehicles generally travel on different road conditions, and withstand strong shock and vibration. In order to reduce or isolate the strong shock and vibration, it is necessary to propose and develop a high-performance vehicle suspension system. Objective: This study aims to report a pneumatic artificial muscle bionic kangaroo leg suspension to improve the comfort performance of vehicle suspension system. Methods: In summarizing the existing vehicle suspension systems and analyzing their advantages and disadvantages, this paper introduces a new patent of vehicle suspension system based on the excellent damping and buffering performance of kangaroo leg, A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension. According to the biomimetic principle, the pneumatic artificial muscles bionic kangaroo leg suspension with equal bone ratio is constructed on the basis of the kangaroo leg crural index, and two working modes (passive and active modes) are designed for the suspension. Moreover, the working principle of the suspension system is introduced, and the rod system equations for the suspension structure are built up. The characteristic simulation model of this bionic suspension is established in Adams, and the vertical performance is analysed. Results: It is found that the largest deformation happens in the bionic heel spring and the largest angle change occurs in the bionic ankle joint under impulse road excitation, which is similar to the dynamic characteristics of kangaroo leg. Furthermore, the dynamic displacement and the acceleration of the vehicle body are both sharply reduced. Conclusion: The simulation results show that the comfort performance of this bionic suspension is excellent under the impulse road excitation, which indicates the bionic suspension structure is feasible and reasonable to be applied to vehicle suspensions.

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