As mentioned, the drag equation with a constant drag coefficient gives the force experienced by an object moving through a fluid at relatively large velocity.
non-newtonian fluids. Newton's equation relates shear stress and velocity gradient by means of a quantity called viscosity. ... A non-newtonian fluid is one in which the viscosity is a function some mechanical variable like shear stress or time.
Have students calculate the density of the fluid. Weigh the empty graduated cylinder. Fill the cylinder with fluid, and record the volume. Weigh the full graduated cylinder. Subtract the mass of the empty graduated cylinder to determine the mass of the fluid. The density of the fluid is the mass over the volume.
L is the length or diameter of the fluid. Reynolds number formula is used in the problems to find the Velocity (V), density ( ), Viscosity ( ) and diameter (L) of the fluid. It is dimensionless. If 2000 < Re < 4000 it is called transition.
The units of dynamic viscosity are: Force / area x time The Pascal unit (Pa) is used to describe pressure or stress = force per area This unit can be combined with time (sec) to define dynamic viscosity. The kinematic viscosity can also be determined by dividing the dynamic viscosity by the fluid density.
The viscosity of air depends mostly on the temperature. At 15 °C, the viscosity of air is1.81×10−5 kg/(m. ... The kinematic viscosity at 15 °C is1.48×10−5 m2/s or 14.8 cSt.
Gather the necessary materials for the experiment. ... Calculate the density of your chosen sphere. ... Determine the density of the liquid you are measuring. ... Fill the graduated cylinder with the liquid to be measured and mark positions at the top and bottom of cylinder.
Viscometer. A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used.
Gather the necessary materials for the experiment. ... Calculate the density of your chosen sphere. ... Determine the density of the liquid you are measuring. ... Fill the graduated cylinder with the liquid to be measured and mark positions at the top and bottom of cylinder. More items...
The SI unit of kinematic viscosity is m2/s. The cgs physical unit for kinematic viscosity is the stokes (St), named after George Gabriel Stokes. It is sometimes expressed in terms of centistokes (cSt). In U.S. usage, stoke is sometimes used as the singular form.
Fluid viscosity changes with temperature. Pressure has a small impact on gas viscosity and the pressure impact on the viscosity of a liquid is very small. When studying multiphase liquids (a mixture of gas, liquid and solids) there are other factors that come into play.
Viscosity index (VI) is an arbitrary measure for the change of viscosity with variations in temperature. The lower the VI, the greater the change of viscosity of the oil with temperature and vice versa. It is used to characterize viscosity changes with relation to temperature in lubricating oil.
Along with the shear rate, temperature really is the dominating influence. The higher the temperature is, the lower a substance's viscosity is. Consequently, decreasing temperature causes an increase in viscosity. .
But most importantly, highly viscous lava is associated with explosive eruptions and dangerous pyroclastic flows. An example of a low viscosity (fast flowing) lava is basaltic lava. This flows quickly out of a volcano at a temperature of about 950 degrees Celsius.
Magmas that have a high silica content will therefore exhibit greater degrees of polymerization, and have higher viscosities, than those with low-silica contents. The amount of dissolved gases in the magma can also affect it's viscosity, but in a more ambiguous way than temperature and silica content.
Viscosity is a measure of an oil's resistance to flow. It decreases (thins) with increasing temperature and increases (or thickens) with decreased temperature.
Image result for what is a high viscosity? The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water.
Pitch is the name for any of a number of highly viscous liquids that appear solid, most commonly bitumen. At room temperature, tar pitch flows at a very low rate, taking several years to form a single drop.
Viscosity (a fluid's resistance to flow) is rated at 0° F (represented by the number preceding the "W" [for Winter]) and at 212° F (represented by the second number in the viscosity designation).
Sir, whether air resistance can be called as viscosity
ReplyDeleteAs mentioned, the drag equation with a constant drag coefficient gives the force experienced by an object moving through a fluid at relatively large velocity.
DeleteWhat is the equation for viscosity?
ReplyDeletenon-newtonian fluids. Newton's equation relates shear stress and velocity gradient by means of a quantity called viscosity. ... A non-newtonian fluid is one in which the viscosity is a function some mechanical variable like shear stress or time.
DeleteHow doe you determine viscosity?
ReplyDeleteHave students calculate the density of the fluid.
DeleteWeigh the empty graduated cylinder.
Fill the cylinder with fluid, and record the volume.
Weigh the full graduated cylinder. Subtract the mass of the empty graduated cylinder to determine the mass of the fluid.
The density of the fluid is the mass over the volume.
what is the formula for Reynolds number?
ReplyDeleteL is the length or diameter of the fluid. Reynolds number formula is used in the problems to find the Velocity (V), density ( ), Viscosity ( ) and diameter (L) of the fluid. It is dimensionless. If 2000 < Re < 4000 it is called transition.
DeleteHow is dynamic viscosity calculated?
ReplyDeleteThe units of dynamic viscosity are: Force / area x time The Pascal unit (Pa) is used to describe pressure or stress = force per area This unit can be combined with time (sec) to define dynamic viscosity. The kinematic viscosity can also be determined by dividing the dynamic viscosity by the fluid density.
Deletewhat is the viscosity of honey?
ReplyDeleteMaterial Viscosity in Centipoise
DeleteCastrol Oil 1,000 cps
Karo Syrup 5,000 cps
Honey 10,000 cps
what is the viscosity of air ?
ReplyDeleteThe viscosity of air depends mostly on the temperature. At 15 °C, the viscosity of air is1.81×10−5 kg/(m. ... The kinematic viscosity at 15 °C is1.48×10−5 m2/s or 14.8 cSt.
Deletehow do you measure the viscosity of a liquid?
ReplyDeleteGather the necessary materials for the experiment. ...
DeleteCalculate the density of your chosen sphere. ...
Determine the density of the liquid you are measuring. ...
Fill the graduated cylinder with the liquid to be measured and mark positions at the top and bottom of cylinder.
How do you measure viscosity of oil?
ReplyDeleteA more recent development for field measure of kinematic viscosity utilizes a split aluminum cell capillary .
Deletewhich instrument is used to measure viscosity?
ReplyDeleteViscometer. A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used.
Deletehow do the measure viscosity?
ReplyDeleteGather the necessary materials for the experiment. ...
DeleteCalculate the density of your chosen sphere. ...
Determine the density of the liquid you are measuring. ...
Fill the graduated cylinder with the liquid to be measured and mark positions at the top and bottom of cylinder.
More items...
what is the unit of viscosity?
ReplyDeleteThe SI unit of kinematic viscosity is m2/s. The cgs physical unit for kinematic viscosity is the stokes (St), named after George Gabriel Stokes. It is sometimes expressed in terms of centistokes (cSt). In U.S. usage, stoke is sometimes used as the singular form.
Deletewhat are the factor that affect viscosity?
ReplyDeleteFluid viscosity changes with temperature. Pressure has a small impact on gas viscosity and the pressure impact on the viscosity of a liquid is very small. When studying multiphase liquids (a mixture of gas, liquid and solids) there are other factors that come into play.
Deletewhat is the viscosity index?
ReplyDeleteViscosity index (VI) is an arbitrary measure for the change of viscosity with variations in temperature. The lower the VI, the greater the change of viscosity of the oil with temperature and vice versa. It is used to characterize viscosity changes with relation to temperature in lubricating oil.
Deletewhat influences viscosity?
ReplyDeleteAlong with the shear rate, temperature really is the dominating influence. The higher the temperature is, the lower a substance's viscosity is. Consequently, decreasing temperature causes an increase in viscosity. .
Deletewhat is viscosity in a volcano?
ReplyDeleteBut most importantly, highly viscous lava is associated with explosive eruptions and dangerous pyroclastic flows. An example of a low viscosity (fast flowing) lava is basaltic lava. This flows quickly out of a volcano at a temperature of about 950 degrees Celsius.
Deletewhat factors determine the viscosity of lava?
ReplyDeleteMagmas that have a high silica content will therefore exhibit greater degrees of polymerization, and have higher viscosities, than those with low-silica contents. The amount of dissolved gases in the magma can also affect it's viscosity, but in a more ambiguous way than temperature and silica content.
Deletewhy the lubricant oils should be of high viscosity?
ReplyDeleteViscosity is a measure of an oil's resistance to flow. It decreases (thins) with increasing temperature and increases (or thickens) with decreased temperature.
Deletewhat is a high viscosity?
ReplyDeleteImage result for what is a high viscosity?
DeleteThe viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of "thickness"; for example, honey has a much higher viscosity than water.
what is the most viscous liquid in the world?
ReplyDeletePitch is the name for any of a number of highly viscous liquids that appear solid, most commonly bitumen. At room temperature, tar pitch flows at a very low rate, taking several years to form a single drop.
Deletewhat is viscosity of engine oil?
ReplyDeleteViscosity (a fluid's resistance to flow) is rated at 0° F (represented by the number preceding the "W" [for Winter]) and at 212° F (represented by the second number in the viscosity designation).
Delete