![]() This is because honey is more viscous than water. If we take water and honey in a pot and try to pour, we find that water is flowing more smoothly and quicker than honey. The concept of viscosity will be more clear if we consider the following example. In general, liquids have more viscosity than gases. So, a fluid having large viscosity provides more internal friction to resist flow whereas a fluid with lower viscosity provides little friction. For a fluid in motion, viscosity describes internal friction. In fluid mechanics, Viscosity is defined as the measure of a fluid’s resistance to fluid flow under an applied force. The term “viscosity” has its root in the Latin term “Viscum” which refers to a viscous glue originating from mistletoe berries. Practical Applications of Viscosity Definition of Viscosity.The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Routinely monitoring your lubricants allows you to trend features such as oxidation, so you will know when an unusual problem arises. If you are using regular oil analysis, you should be able to identify any increase in viscosity, and hopefully the root cause of the issue. Where this occurs, it’s best to consider changing the oil that you’re using in the application. This is most common in poorly formulated oils, and occurs as the oils are subjected to high temperatures. Using regular oil analysis can help identify issues of contamination and oxidation, allowing you to take preventative action.Īnother reason for increasing oil viscosity is evaporation. Water contamination can also lead to an increase in viscosity as the oil emulsifies. Contamination with dirt can increase the viscosity if there are significant levels within the oil. Oil degradation and contamination can also lead to an increase in viscosity. You should always top up a system with the same product, or another with similar properties which is fully miscible. We often come across cases where lubricators have used whatever product was available to top up a piece of equipment, but this will affect the thickness if it’s a different viscosity. The main reason for oil thickening is topping it up with another oil of a higher viscosity. Thicker oil can lead to higher operating temperatures, increased drag and decreased efficiency. While it is usual for your oil to reduce in viscosity as it ages, there are a number of reasons that you might find your lubricating oil thickening.
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