👉 A guest fluid, also known as a guest gas or transient guest, refers to a type of gas that temporarily enters a system, usually a closed environment like a container or a vessel, without being permanently integrated into the system's fluid. This can occur due to leaks, breaches, or other disturbances that allow gases to escape or enter the system. Guest fluids can originate from external sources, such as atmospheric air, or from within the system itself, like escaping from a container. These gases are usually inert and do not participate in chemical reactions, but they can affect the system's pressure, temperature, or composition temporarily. Understanding and managing guest fluids is crucial in various applications, including chemical processing, storage, and transportation, to ensure safety and efficiency.