👉 The secondary fluid, also known as the secondary phase or secondary carrier, is a component in processes like emulsification, where it acts as an additional medium to mix and stabilize the primary fluid, typically oil and water. Unlike the primary fluid (usually oil or water), the secondary fluid is usually immiscible with it but can be manipulated to form stable mixtures, such as oil-in-water or water-in-oil emulsions. This secondary fluid enhances the process by providing a different chemical environment, reducing interfacial tension, and improving the dispersion and stability of the dispersed phase. For example, in food processing, it might be used to create stable emulsions like mayonnaise or salad dressings. In industrial applications, it can aid in the formation of foams, dispersions, and other complex structures.