Oldroyd Model

The Oldroyd model describes how certain complex fluids, like paints or blood, behave under stress. Unlike simple liquids such as water, these fluids have both liquid and elastic (spring-like) properties. The model combines Newtonian viscosity (how fluids resist flow) with elastic effects, capturing how they stretch and recover over time. Essentially, it explains how such materials deform and flow when forces are applied and then removed, providing a mathematical framework for predicting their behavior in practical situations like manufacturing or biomedical applications.