nonpremix
Nonpremix refers to a state of combustion where the fuel and oxidizer are not uniformly mixed before entering the combustion zone. This contrasts with premixed combustion, where the fuel and oxidizer are thoroughly blended beforehand. In nonpremixed systems, the reactants diffuse into the combustion zone and mix through molecular and turbulent transport as they burn. This type of combustion is common in many practical applications, such as diffusion flames found in candles, gas stoves, and many industrial furnaces.
The primary characteristic of nonpremixed combustion is the spatial separation of fuel and oxidizer, leading to