What is poise and stokes?

Poise and stokes are units of measure used to quantify viscosity. Poise is a unit of measurement used particularly for dynamic viscosity, while stokes is for kinematic viscosity. Viscosity, which describes a fluid's consistency or "thickness," comes in these two types for some distinct reasons.

What is a stokes unit?

Stokes (symbol: St) + centiStokes (symbol: cSt)

This is the CGS unit, equivalent to square centimetres per second (cm2 s–1). One stokes is equal to the viscosity in poise divided by the density of the fluid in grams per cubic centimetre (g·cm–3).

How do you convert poise to stokes?

Stokes = A x Poise / (Fluid Density) where A = 1000, if the fluid density is measured in kg per cubic meter. That is, at standard pressure and 15 C temperature, the dynamic viscosity of air is roughly 0.000173 poise, and the kinematic viscosity of air is roughly 0.141 stokes.

What is a poise in viscosity?

A poise is the centimetre-gram-second (cgs) unit of viscosity. It expresses the force needed to maintain a unit… In gas: Viscosity. …still often used is the poise (1 Pa · s = 10 poise). At 20° C the viscosity of water is 1.0 × 10^-3 Pa · s and that of air is 1.8 × 10^-5 Pa · s.

What is the value of 1 poise?

1 poise = 100 centipoise = =1gcm−1s−1=0. 1kgm−1s−1.

What is Poise,Stoke ? Dynamic and Kinematic viscosity | Fluid Mechanics | Hydraulics | Bhandarkar |

What is unit of viscosity?

The unit of viscosity is newton-second per square metre, which is usually expressed as pascal-second in SI units.

Is poise a SI unit of viscosity?

The unit of viscosity in the CGS system is poise (P) and that in SI is poiseuille (Pl).

What is the relation between poise and poiseuille?

One poise is exactly 0.1 Pa·s. One poiseuille is 10 poise or 1000 cP, while 1 cP = 1 mPa·s (one millipascal-second). This is the cgs unit, equivalent to square centimetre per second. One stokes is equal to the viscosity in poise divided by the density of the fluid in g cm–3.

What is the relation between poise and SI unit of viscosity?

UPLOAD PHOTO AND GET THE ANSWER NOW! Solution : SI unit of viscosity is Pa-s and cgs unit of viscosity is `dyn e cm^(-2)s` or poise, where `1 Pa-s = 10 dyn e cm^(-2)s = 10 poise`.

What is Torque in viscosity?

the amount of torque resistance measured by a rotating spindle immersed in a material. Volt. unit of measurement for voltage unless otherwise indicated; abbreviated as V. Viscometer. an instrument that measures the viscosity of materials.

What is viscosity of water?

The viscosity of water at a temperature of 20 degrees Celsius is roughly equal to 0.01 poise or 10^-3 Pa. s (Pascal seconds). Alternately, this value can be represented as 1.0016 mPa.

How is viscosity calculated?

There are several formulas and equations to calculate viscosity, the most common of which is Viscosity = (2 x (ball density – liquid density) x g x a^2) ÷ (9 x v), where g = acceleration due to gravity = 9.8 m/s^2, a = radius of ball bearing, and v = velocity of ball bearing through liquid.

What is Stokes method physics?

Stoke's law was established by an English scientist Sir George G Stokes (1819-1903). When a spherical body moves down through an infinite column of highly viscous liquid, it drags the layer of the liquid in contact with it. As a result, the body experiences a retarding force.

What is Stokes law used for?

We use Stoke's law to determine the terminal velocity, the size and the density of sphere and liquid, respectively. Stoke's law can also be used to calculate the viscosity of the fluid.

What is viscosity in chemistry?

Viscosity is a measure of a fluid's resistance to flow.

Is poise CGS or MKS?

The cgs unit of viscosity is poise (P) and this name has been used in honor of a French physiologist Jean Léonard Marie Poiseuille.

What is poise Class 11?

The unit poise (P) is equivalent to dyne-second per centimeter. Poise can be explained as the tangential force of 1 dyne per square centimeter to maintain the velocity difference of about 1centimeter per second. Poise is generally measured ingcm-1sec-1.

What is the symbol for viscosity?

Viscosity is usually denoted by the Greek symbol μ (mu) and is defined as the ratio of shearing stress τ (Greek letter tau) to the rate of change of velocity, v, which in mathematical terms can be expressed as dv/dy (where this is the derivative of the of the velocity with respect to the distance y).

What is Newton's law of viscosity?

Newton's law of viscosity defines the relationship between the shear stress and shear rate of a fluid subjected to a mechanical stress. The ratio of shear stress to shear rate is a constant, for a given temperature and pressure, and is defined as the viscosity or coefficient of viscosity.

Why is viscosity important?

Viscosity of a liquid is an important parameter as it can be used as an indicator of quality by the consumer, in some instances a thicker liquid being thought of as superior quality when compared to a thinner product. Viscosity is also a characteristic of the texture of food.

What are the types of viscosity?

Viscosity is the measure of a liquid's resistance to flow. There are two types of viscosity: Dynamic viscosity and Kinematic viscosity.

What is density and viscosity?

In fluid dynamics, viscosity is the parameter to measure the thickness or thinness of any given fluid. Density is the measure of spaces between two particles in a given fluid. Viscosity and density are the characteristics of a fluid, but there is no direct relation between viscosity and density.