9/19/2023 0 Comments Kinematic vs dynamic viscosity![]() ![]() ![]() Lastly, they differ in terms of their units kinematic viscosity = m2/s, whereas the unit of dynamic viscosity = Ns/m2. The average absolute deviation of dynamic viscosity and kinematic viscosity of FA at 288.15 and 394.25K are 4.14 and 4.37, respectively.It is used when both inertia and viscosity force is dominant, whereas when only viscosity force is dominant dynamic viscosity is used. Both of these are used in different situations for kinematic viscosity.Absolute viscosity is another term for dynamic viscosity. Diffusivity of the momentum is another term for kinematic viscosity. ![]() Both of them are also called or known by other terms. Kinematic viscosity is dynamic viscosity divided by density (Formula F7.9) and is the ratio of viscous forces to inertia forces.In terms of dependency on density, both of them differ, as in the case of kinematic viscosity, it is dependent, whereas it is not dependent in the case of dynamic viscosity.This also implies that dynamic viscosity is a must for the calculation of kinematic viscosity. Put another way, kinematic viscosity is the measure of a fluid’s inherent resistance to flow when no external force, except gravity, is acting on it. The ratio used in the case of Kinematic viscosity is the ratio of dynamic viscosity to density, while for dynamic viscosity, the ratio used is the ratio of shear stress to shear strain.The metric unit is square metres per second (m2/s). Measured in stokes (St) or centistokes (cSt). Also known as the coefficient of kinematic viscosity. For Kinematic viscosity, the symbol is used in ‘v’, while for dynamic viscosity, ‘μ’ is for representation. Kinematic Viscosity Definition: The absolute viscosity of a fluid divided by the density of the fluid. As mentioned above, both of them represent different things, and hence, they are also represented by different symbols.Kinematic viscosity is used for the representation of both inertia and viscous force, whereas the representation of the viscous force of the fluid with the help of dynamic viscosity is taken. Both of them represent different things. Kinematic viscosity can be computed by multiplying dynamic viscosity by density.Main Differences Between Kinematic and Dynamic Viscosity When only viscosity force is dominant dynamic viscosity is used. Absolute viscosity is another term used for dynamic viscosity. It is not dependent on the case of dynamic viscosity. This also implies that for calculating the kinematic viscosity, dynamic viscosity must be calculated. Dynamic viscosity the ratio used is the ratio of shear stress to shear strain. ![]()
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