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The picture shows a 20 kiloton air burst at 540 meters, to optimize the area covered by at least 15 psi blast damage. Mach stem formation occurs when a blast wave reflects off the ground and the reflection catches up with the original shock front, therefore creating a high pressure zone that extends from the ground up to a certain point called ...
The Mach angle is acute, showing that the body exceeds Mach 1. The angle of the Mach wave (~59 degrees) indicates a velocity of about Mach 1.17. In fluid dynamics, a Mach wave, also known as a weak discontinuity, [1] [2] is a pressure wave traveling with the speed of sound caused by a slight change of pressure added to a compressible flow.
This is caused by the nonlinear behavior of shock waves. When the blast wave from an air burst reaches the ground it is reflected. Below a certain reflection angle, the reflected wave and the direct wave merge and form a reinforced horizontal wave, known as the '"Mach stem" and is a form of constructive interference.
Mach bands can also appear when there is a discontinuity in the derivative of a gradient, a visual effect common when intensities are linearly interpolated such as in Gouraud shading. Computer image processing systems use edge-detection in a way analogous to the brain, using unsharp masking to clarify edges in photos for example.
English: Chronological sequence of the Mach-reflected detonation wave of a 20 kiloton air burst (burst height 540 metres equivalent to a maximized 15 psi or 103 kPa range) at 0.5, 1.25 and 3 seconds after detonation. The blue curve indicates the propagating shock front (refraction due to fireball is neglected here).
Food blogger snackbetch now reports that Taco Bell will be rolling out new menu items nationwide soon, and while some, like the Midnight Cherry Freeze, have been met with glee, the pie is drawing ...
Mach reflection can exist in steady, pseudo-steady and unsteady flows. When a shock wave, which is moving with a constant velocity, propagates over a solid wedge, the flow generated by the shock impinges on the wedge thus generating a second reflected shock, which ensures that the velocity of the flow is parallel to the wedge surface.
Bubble Mouse Blast is a fast paced match three style game that will keep you on the edge of your seat. Your goal is to clear the board by matching pieces of candy together. While lining up your ...