density gradient theory

Density gradient theory is a way scientists describe how the density of a substance changes smoothly across a boundary, like the interface between oil and water. Instead of assuming a sudden change, it recognizes that molecules transition gradually, creating a gradient or gradual variation in density. This approach helps in modeling physical properties and behaviors of mixtures, especially in complex systems like fluids with interfaces, by considering the continuous variation rather than sharp boundaries. It’s a useful tool in fields like chemical engineering and material science for understanding and predicting how different substances interact at their boundaries.