A Free-Lagrange method for unsteady compressible flow: simulation of a confined cylindrical blast wave

Shock Waves ◽  
1996 ◽  
Vol 5 (5) ◽  
pp. 311-325
Author(s):  
G.J. Ball
Keyword(s):  
Compressible Flow ◽  
Blast Wave ◽  
Flow Simulation ◽  
Lagrange Method ◽  
Cylindrical Blast Wave

scholarly journals Implicit gradient reconstruction (IGR) method for compressible flow simulation

2017 ◽  
Vol 822 ◽  
pp. 012030
Author(s):  
Manish K Singh ◽  
N Munikrishna ◽  
V Ramesh ◽  
N Balakrishnan
Keyword(s):  
Compressible Flow ◽  
Flow Simulation ◽  
Gradient Reconstruction

scholarly journals An efficient targeted ENO scheme with local adaptive dissipation for compressible flow simulation

2021 ◽  
Vol 425 ◽  
pp. 109902
Author(s):  
Jun Peng ◽  
Shengping Liu ◽  
Shiyao Li ◽  
Ke Zhang ◽  
Yiqing Shen
Keyword(s):  
Compressible Flow ◽  
Flow Simulation ◽  
Eno Scheme

Third-order blast wave theory and its application to hypersonic flow past blunt-nosed cylinders

1960 ◽  
Vol 9 (4) ◽  
pp. 613-620 ◽  
Author(s):  
R. J. Swigart
Keyword(s):  
Hypersonic Flow ◽  
Blast Wave ◽  
Wave Theory ◽  
Inviscid Flow ◽  
Order Theory ◽  
Third Order ◽  
Surface Pressure Distribution ◽  
Flow Past ◽  
Cylindrical Blast Wave ◽  
Flow Variables

The inviscid flow behind a cylindrical blast wave and its analogy with hypersonic flow past blunt-nosed cylinders is considered. Sakurai (1953, 1954) obtained a solution for the flow field behind a propagating blast wave by expanding the flow variables in power series of 1/M2, where M is the blast wave Mach number, and determining the coefficients of the first two terms in the series. Here the work is extended to include third-order terms. Third-order theory is shown to improve the prediction of shock wave shapes and surface pressure distribution on hemisphere-cylinder configurations at M∞ = 7·7 and 17·18.

Assessment of Free Surface Treatment Techniques and Turbulence Models Influence Using the Slightly Compressible Flow Simulation

2007 ◽  
Author(s):  
C. Ciortan ◽  
C. Guedes Soares ◽  
J. Wanderley
Keyword(s):  
Free Surface ◽  
Surface Treatment ◽  
Compressible Flow ◽  
Flow Simulation ◽  
Turbulence Models ◽  
Slightly Compressible ◽  
Eddy Simulation ◽  
Treatment Techniques ◽  
Flow Parameters ◽  
Wigley Hull

A free surface, finite-difference code on collocated grids, using the Slightly Compressible Flow formulation, is used for simulating turbulent flow around a Wigley hull. Two free-surface treatment techniques are compared in terms of accuracy and influence on the flow parameters. The runs were performed in standard conditions of Froude numbers and the results were compared against experimental and numerical results. The initial version of the code used an interface-tracking technique and two turbulence models (Large Eddy Simulation and Baldwin-Lomax). The numerical scheme was marched in time using the factorized Beam and Warming implicit method. The second version of the code uses an interface-capturing technique. For the time being, the code uses a fixed grid on which the kinematic free surface equation is solved. The grid is identical to the initial grid used in the first set of formulations. Other changes in the code were necessary, the most important being the switch of the time-marching method to a 2nd order, explicit Runge-Kutta. The results show good agreement with the experimental results.

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