Ergun

Ergun is a Turkish given name and surname. In Turkish naming traditions, it is used for men and appears both as a first name and as a family name among people of Turkish heritage. The name is encountered in various fields and contexts but does not point to a single universally recognized figure.

In scientific and engineering literature, the term Ergun is best known for the Ergun equation, a foundational relation in chemical engineering. The Ergun equation describes the pressure drop of a fluid flowing through a packed bed, combining viscous and inertial contributions to flow. It is commonly written as -dP/dL = (150 μ (1-ε)^2 / (ε^3 d_p^2)) v + (1.75 ρ (1-ε) / (ε^3 d_p)) v^2, where μ is dynamic viscosity, ρ is fluid density, ε is bed porosity, d_p is particle diameter, and v is superficial velocity. This equation is widely used to estimate pressure losses in packed-bed reactors,filters, and related devices, influencing design and analysis in chemical engineering and process industries.

Beyond personal names, Ergun primarily appears in scholarly contexts as the eponym of the equation. The term thus serves both as a cultural surname and as a technical reference in fluid mechanics and multiphase flow.