Bingham plastic

A Bingham plastic is a type of fluid that behaves like a solid at low stress levels but flows like a liquid once a certain minimum force, called yield stress, is applied. In other words, it needs to be "shaken up" or pushed hard enough before it moves. Common examples include toothpaste and mud, which stay still until you squeeze or stir them. This behavior is important in industries like drilling, food production, and cosmetics, where controlling flow and stability is essential for processing and handling materials effectively.