= Thermodynamic relations across normal shocks
{wiki=Thermodynamic_relations_across_normal_shocks}
Thermodynamic relations across normal shocks are essential for understanding the behavior of fluids—specifically, gases—when they experience a sudden change in pressure and density, such as across a shock wave. A normal shock wave is one that is perpendicular to the direction of the flow. When a fluid (often a gas) passes through a normal shock, several key thermodynamic and flow properties change. These changes can be described using the conservation equations and thermodynamic relations.
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