The physical unit for dynamic viscosity in the centimetre gram second system of units (cgs) is the poise (P). Dynamic viscosity: Dynamic viscosity is also known as absolute viscosity. The SI physical unit of dynamic viscosity ( μ) is the Pascal-second (Pa s), identical to 1 kg m−1 s−1. ![]() ĭynamic vs Kinematic Viscosity: What is the difference?ġ. In lubrication practice, the earlier mentioned cP unit is widely used. The unit of viscosity is newton-second per square meter ( ), which is usually expressed as pascal-second ( ) in SI units. Viscosity can also help you determine the structure of molecules such as proteins in a solution or the force required to inject a new drug formulation into a patient. Viscosity will also determine how much energy is required to pump out process fluid. It will determine, for example – How long a reservoir will take to fill. Viscosity is key for any process involving fluid flow.
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