Stokes (St or S ) – A fluid with a dynamic viscosity of 1 poise and a 1 gram per cubic centimeter density has a kinematic viscosity of 1 stokes. If the top plate moves the same distance as the distance between the plates in one second, then the liquid between the plates has a dynamic viscosity unit of one pascal-second. If you place a fluid between two parallel plates, the top plate pushes parallel to the bottom plate with a constant pressure of one pascal. s) – A derived metric SI measurement unit of dynamic viscosity.To clarify, 1 centipoise is 0.01 poises and 1 poise is 100 centipoises. It’s pronounced “pwahz” after the French scientist Jean Léonard Marie Poiseuille. Poise (P) – A CGS unit of viscosity of dynamic viscosity.

It is 1/100 th of the CGS unit named poise (P)

The other is centimeter, gram, and second (CGS) or Gaussian system.Ĭentipoise (cP) – A viscosity unit in cgs. One is the Systeme International or SI system, which uses Meters, Kilograms, and Seconds or MKS units of viscosity for length, mass, and time. In physics, there are two measuring systems. Let’s review a few terms before getting into the formulas. If you need more information about using formulas, go to our blog, “ Let It Flow: How to Calculate Viscosity. Too thick and spray nozzles can clog, too thin, and the product may run, overflow, or cause other problems.Ĭalculating viscosity will help you control it and know when a product is ready to use. In a production environment, it’s critical to know the viscosity of a liquid so that it will flow properly through the equipment. For instance, if you drop a steel ball into a glass of water, it will sink faster than if you drop it into the same glass filled with honey. Thicker liquids resist movement or shear stresses more than low viscosity liquids. The different layers of molecules in a liquid provide resistance as they try to move past each other. It represents a measurement of the resistance of objects passing through a fluid. Most of us describe a liquid as thick or thin, but the technical term is viscosity. Our heaters are custom-engineered with your specific container dimensions and product needs in mind. Powerblanket drum and barrel heaters are designed to provide optimal, uniform heating to maintain proper viscosity across various liquid products. This article will discuss its measurement, the units of viscosity, and ways to apply heat for production in any industry. To control the thickness of fluids for consistency, we need to understand how to calculate it. A higher temperature lowers a liquid’s thickness, increasing the flow. Temperature is the controlling factor for a better flow. The best way to increase and maintain the correct viscosity is to add heat. Whether it’s a production line enrobing chocolate-covered candy bars or an oil platform pumping up crude oil, production and profits drop when liquids become too viscous (thick). For food, beverage, petroleum, and other companies that handle liquids, flow rate and viscosity are two elements that affect an operation’s success and profitability.

Viscosity units in si