👉 Turgency, also known as viscosity or rigidity, is a measure of how much fluid can flow through a tube. It is often used in the field of engineering and physics to describe the strength of fluids at different pressures. When a fluid flows through a tube under pressure, it experiences an internal force called shear stress that causes it to deform. The more viscous the material, the larger this deformation will be. This deformation can cause the tube to become narrower or thicker depending on its viscosity