Bullet Shockwave Simulations

This is a showcase of numerical simulations using the space-time Conservation Element and Solution Element (CESE) method, which was first introduced by Dr. Chang in NASA Glenn Research Center at 1955. This is a novel numerical framework for solving conservation laws and differs substantially in concept and methodology from well-established methods such as finite difference, finite volume, finite element, and spectral methods. More about CESE method here: [lnkd.in/gxCpYx2C]
The simulation results show the Schlieren Number, which is a quantity for capturing or highlighting the shock structure in a compressible flow. The Schlieren photography is a process for photographing fluid flow, invented by the German physicist August Toepler in 1864 to study supersonic motion, it is widely used in aeronautical engineering to photograph the flow of air around objects. More about Bullet Schlieren here: [lnkd.in/g7vFUBeB]
Four bullet velocities were considered here: 150, 300, 900, and 1500 m/s. The Schlieren number contours for the last two cases are quite distinct, which is due to the bullet travelling at supersonic speeds. The first case (150 m/s) can be considered as subsonic speed whereas the second one (300 m/s) can be categorized as transonic speed.
The "frame per second" rate for each case was adjusted accordingly so that we can compare the cases side by side. In the actual speed, the bullet in the first case (150 m/s) will take 10x amount of time to travel the same distance as the last case (1500 m/s).
A sample input file of bullet travelling at supersonic velocity can be found here: [lnkd.in/gbFCjmpW]

[@yiayangsocial]

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[@AmeenTopa]

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[@khaleedairil1975]

Baru belajar ls dyna ni sebulan. The tutorial ur doing is a great help

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[@kukehanser]

How can I get the velocity and pressure of a specified point from the fluid domain? Thank You.

[@AmeenTopa]

Yes, you can. You need to use one of the DATABASE options.

[@nuramirulhijjaz3838]

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[@AmeenTopa]

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[@Panzer601]

Cool

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