{"id":2616,"date":"2022-04-22T20:39:14","date_gmt":"2022-04-22T20:39:14","guid":{"rendered":"https:\/\/mdr.foobrdigital.com\/?p=2616"},"modified":"2022-04-22T20:39:14","modified_gmt":"2022-04-22T20:39:14","slug":"unit-of-viscosity","status":"publish","type":"post","link":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/2022\/04\/22\/unit-of-viscosity\/","title":{"rendered":"Unit of Viscosity"},"content":{"rendered":"\n
What is Viscosity?<\/h2>\n\n\n\n
Viscosity is defined as the quantity that represents a fluid\u2019s resistance to flow. To put it in more simple terms, viscosity is the friction between the molecules of the fluid. We usually relate to the viscosity of a liquid by measuring the \u201cthickness\u201d. For example, we can state that honey is \u201cthicker\u201d (meaning a higher viscosity) than normal water.<\/p>\n\n\n\n
Viscosity is represented by the symbol \u03b7 \u201ceta\u201d and the use of the Greek letter mu (\u03bc) is also common. Furthermore, viscosity is also known as dynamic viscosity or absolute viscosity. Apart from this we also deal with terms like kinematic viscosity or momentum diffusivity.\u00a0 The main\u00a0difference between kinematic and dynamic viscosity\u00a0is that dynamic viscosity is the measurement of fluid\u2019s internal resistance to the flow while kinematic viscosity is the ratio of dynamic viscosity to the density. Now that we have learned some information about viscosity, let\u2019s study the unit of viscosity below.<\/p>\n\n\n\n
Unit of Viscosity<\/strong><\/td><\/tr>
Si Unit<\/strong><\/td>
Pascal seconds (Pa\u00b7s) or kg\u00b7m\u22121<\/sup>\u00b7s\u22121<\/sup><\/td><\/tr>
CGS Unit<\/strong><\/td>
Poise (P)<\/td><\/tr>
Unit of Kinematic Viscosity<\/strong><\/td><\/tr>
Si Unit<\/strong><\/td>
square meter per second or m2<\/sup>\/s<\/td><\/tr>
The SI unit of viscosity is the pascal second (Pa\u00b7s) or kg\u00b7m\u22121<\/sup>\u00b7s\u22121<\/sup>.<\/li>
The SI unit of kinematic viscosity is square meter per second or m2<\/sup>\/s.<\/li><\/ul>\n\n\n\n
CGS Unit of Viscosity<\/h3>\n\n\n\n
The cgs unit of viscosity is poise (P) and this name has been used in honor of a French physiologist Jean L\u00e9onard Marie Poiseuille. It is also commonly used particularly in ASTM standards, as centipoise (cP).<\/li>
The cgs unit for kinematic viscosity is stoke (St) and has been named after Irish mathematician and physicist Sir George Gabriel Stokes. Sometimes the unit centistokes (cSt) is also used.<\/li><\/ul>\n\n\n\n
Other Common Viscosity Units<\/strong><\/h4>\n\n\n\n
Some non-standard units include the Reyn which is a British unit of dynamic viscosity.<\/p>\n\n\n\n
Earlier, kinematic viscosity was measured using Saybolt viscometer where the units were expressed in Saybolt universal seconds (SUS). Other abbreviations such as SUV (Saybolt universal viscosity) or SSU (Saybolt seconds universal) are sometimes used.<\/p>\n\n\n\n
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<\/p>\n\n\n\n
Frequently Asked Questions<\/h2>\n\n\n\n
State Newton\u2019s law of viscosity.<\/h3>\n\n\n\n
Newton\u2019s law of viscosity states that shear stress between the adjacent layers of the fluid is proportional to the velocity gradients between the two layers.<\/p>\n\n\n\n
What will be the viscosity of fluid when the fluid is at rest?<\/h3>\n\n\n\n
The viscosity of fluid when it is at rest will be 1 Poise. Viscosity is not dependent on the state of the fluid. Therefore, if the fluid is at rest or in motion, 1 Poise will remain constant.<\/p>\n\n\n\n
Mention the factors on which viscosity depends.<\/h3>\n\n\n\n
Following are the factors on which viscosity depends:<\/p>\n\n\n\n
Area of contact between the two adjacent layers<\/li>
The velocity difference between the two adjacent layers<\/li>
Distance between the two adjacent layers<\/li><\/ul>\n\n\n\n
Convert 1 Poise into N.s.m-2<\/sup>.<\/h3>\n\n\n\n
Give examples of Newtonian fluids.<\/h3>\n\n\n\n
Water, honey, and organic solvents are examples of Newtonian fluids.<\/p>\n","protected":false},"excerpt":{"rendered":"
What is Viscosity? Viscosity is defined as the quantity that represents a fluid\u2019s resistance to flow. To put it in more simple terms, viscosity is the friction between the molecules of the fluid. We usually relate to the viscosity of a liquid by measuring the \u201cthickness\u201d. For example, we can state that honey is \u201cthicker\u201d (meaning […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/2616"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=2616"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/2616\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=2616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=2616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=2616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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