A shock tube is a device used primarily in experimental fluid dynamics and shock wave research to study the behavior of gases under shock wave conditions. It consists of a long, narrow tube divided into two segments by a diaphragm. One segment (the driver section) is filled with a high-pressure gas, while the other segment (the driven section) is filled with a low-pressure gas.
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A tube in which releasing an initial pressure difference produces a shock, often accompanied by an expansion wave and a contact surface. Spatially separated pressure probes can measure shock arrival speed and jump size. The shock and the contact surface must be identified separately when interpreting the downstream state.