What is stokes law write its formula?
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What is stokes law write its formula?
Stoke’s Law Equation Sir George G. Stokes, an English scientist, clearly expressed the viscous drag force F as: F = 6 π η r v. Where r is the sphere radius, η is the fluid viscosity, and v is the sphere’s velocity.
What is viscous drag state stokes law?
Stoke’s law states that the viscous drag force F experience by a sphere of radius a, moving with a speed v through a fluid with coefficient of viscosity eta , is given by F = 6pieta av If this fluid is flowing through a cylindrical pipe of radius r , length l and a pressure difference of P across its two ends, then the …
What is the relationship between viscosity force R and V?
The viscous drag force on a sphere of radius r moving with a velocity v in a fluid of viscosity η is given by Stokes’ law F=6πηrv.
What is the formula for viscous force?
According to Newton, the viscous force acting between liquid layers of area A and velocity gradient ΔvΔz is given by F=−ηAdvdz, then the dimensions of η are. [ML−2T−2]
What is viscous drag formula?
The viscous drag formula is given by Newton’s law of viscosity, t= nA(dv/dx). In Newton’s law of viscosity, t stands for viscous drag, n is viscosity, A is the area of a fluid layer, and dv/dx is the gradient of the velocity change of each layer parallel to the direction of the shearing stress.
What is the formula for viscosity of a liquid?
The dimensional formula of viscosity is [ML-1T-1]. The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature. Thus, upon heating, liquids flow more easily, whereas gases flow more slowly.
Does viscosity have a formula?
The dimensional formula of viscosity is [ML-1T-1]. The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature.
How is viscosity formula derived?
Or, η = [M1 L1 T-2] × [M0 L2 T0]-1 × [M0 L1 T-1]-1 × [M0 L1 T0] = [M1 L-1 T-1]. Therefore, viscosity is dimensionally represented as [M1 L-1 T-1].
Is oil a Newtonian or non Newtonian?
non-Newtonian fluids
oil, are Newtonian. These fluids are termed non-Newtonian fluids. The viscosity of a non-Newtonian fluid will change due to agitation or pressure—technically known as shear stress.
How do you calculate viscosity?
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 viscosity method?
Viscosity is the measure of a substance’s resistance to motion under an applied force. The formula for measuring viscosity is fairly simple: viscosity = shear stress / shear rate. The result is typically expressed in centipoise (cP), which is the equivalent of 1 mPa s (millipascal second).
How do you calculate the viscosity formula?
How is the viscosity formula derived?
What is the formula of viscometer?
