Viscosity is related to the resistance to flow.
Viscosity is the characteristic of being viscous . Something viscous is adhesive or pasty , differentiating itself from other states such as solid or liquid .
Viscosity refers to the opposing force that a fluid exerts when faced with a tangential deformation . It is a property characterized by the resistance to flow that is generated by the friction between molecules .
Since all known fluids exhibit some level of viscosity, the hypothetical fluid without viscosity (i.e., with zero viscosity) is known as an ideal fluid .
Viscosity characteristics
Viscosity is detected by the friction that is recorded between the successive layers of a fluid . When dragging the surface of a fluid, the lower layers move more slowly than the surface because they are affected by the tangential resistance . Viscosity, therefore, manifests itself in fluids in motion (where tangential forces come into action).
When the viscosity is very high, the friction between adjacent layers is pronounced and the movement is therefore weak.
Honey is characterized by its viscosity.
Your measurement
The viscosity of fluids is measured by the coefficient of viscosity , a parameter that depends on temperature . The physical unit of dynamic viscosity is called pascal-second , according to the International System of Units .
The poise , on the other hand, is the unit of the cg-simal system of units for dynamic viscosity . The name was established in honor of the French scientist Jean Louis Marie Poiseuille .
Kinematic velocity , finally, is the quotient between dynamic viscosity and density. Its physical unit in the CGS system of units is known as stoke , while in the SI it is the square meter/second .
The viscosity of different substances
Viscous is often associated with the term mucus, as both concepts make it clear that the element they refer to is characterized by being slippery, sticky, and also glutinous.
Among the most viscous products are gelatin , various types of soaps , shampoos , gels and other beauty products. It should also be noted that there is a toy that is characterized by its viscosity and that is what has made it the playmate of many children for decades.
Specifically, we are referring to blandiblu , a polymer characterized by being a "dough" of different colors that can be molded to each person's liking to form all kinds of figures. It is also used by the little ones in the house to use it as a "weapon" in fun throwing battles with friends.
This slime-like play dough appeared in 1976 thanks to the Mattel company and caused a great stir in the children's world, and especially in the 1980s when it became one of the most sought-after entertainments for children.
More specifically, we can establish that viscosity is the main identifying feature that identifies each and every one of the existing lubricants. In order to classify lubricants based on their viscosity, variables such as temperature and pressure must be taken into account.