Definition
Rheology is the study of how materials deform and flow, especially when they're subjected to external forces. Think of it like the physics of goo! It’s not just about liquids; it also covers solids that behave unusually, like silly putty or toothpaste. Rheology bridges the gap between ideal solid and fluid behavior. The term describes how substances respond under stress or strain. Understanding it helps us predict how materials will act in different situations, from toothpaste squeezing to lava flowing. It helps engineers design better products and processes by considering these flow properties.