gázréteget

A gázréteget, often translated as gas layer or gas film, refers to a thin layer of gas that forms at the interface between two different phases, typically a liquid and a gas, or a solid and a gas. This layer plays a crucial role in various physical and chemical processes, particularly in mass transfer phenomena.

In the context of mass transfer, the gas layer represents a barrier to the movement of molecules. For instance, when a substance dissolves from a gas into a liquid, it must first diffuse through the gas layer adjacent to the liquid surface. Similarly, when a substance evaporates from a liquid into a gas, it must traverse the gas layer. The resistance offered by this gas layer is a significant factor in determining the overall rate of mass transfer.

The thickness and properties of the gas layer are influenced by factors such as the flow conditions of the gas and liquid phases, the presence of turbulence, and the diffusion coefficients of the diffusing species. In many engineering applications, such as chemical reactors, separation equipment, and heat exchangers, understanding and quantifying the resistance of the gas layer is essential for designing efficient processes. Strategies are often employed to minimize this resistance, such as increasing turbulence or using different flow configurations, to enhance the rate of mass transfer. The concept of a gas layer is fundamental in fields like chemical engineering, fluid mechanics, and environmental science.