To understand the imperial units involved in this relationship it will be necessary to use an example: The imperial unit of Kinematic Viscosity are ft2s Kinematic Viscosity = Dynamic Viscosity / Density Kinematic Viscosity and Dynamic Viscosity Relationship A fluid’s weight is measured in pounds per cubic foot. Normally, density is measured in mass (slugs) per cubic foot. The weight (Ib)of a fluid must be divided by 32.174 to find its mass. Gravitational acceleration(g) is 32.174 feet per second per second. When a force of one pound (Ibf)is applied to the mass, it accelerates by one foot per second. The pound (Ib)is the standard unit of weight in the Imperial system, while the cubic foot is the standard unit of volume and the second is the standard unit of time. Kinematic Viscosity = Dynamic Viscosity/Density By dividing the dynamic viscosity by the fluid density, the kinematic viscosity can be calculated. For calculation, this number must be translated back to1.004×10-6m2. Water has a viscosity of 1.004×10-6m2 at a temperature of 20℃ġ.004000 Centistokes is the result. The fluid head term is removed from the calculations, leaving the units of Kinematic viscosity as area / time. This fluid head is also a part of the equation that determines the fluid’s volume. The timings can be used with a formula to calculate the fluid’s kinematic viscosity in Centistokes(cSt).The head of fluid is the propelling force that propels the fluid out of the cup. The flow of a known volume of fluid from a viscosity measurement cup is sometimes used to determine viscosity. For calculation, this value must be translated back to 1.002×10-3 Pais. To define dynamic viscosity, mix this unit with time (sec).īecause water has a viscosity of 1.002 centipoise at 20℃, the term centipoise (cP) is widely used to nature dynamic viscosity. The Pascal unit (Pa) is used to measure pressure or stress, which is defined as force per unit area. The units of dynamic viscosity are as follows: x time = area / force. Dynamic viscosity is calculated by dividing the rate of shear strain by the shear tension (also known as absolute viscosity). The viscosity of a fluid describes its resistance to flow. The relative density of water at 20☌elsius is 0.998 Dynamic Viscosity μ The fluid density is divided by 1000kg/m3to get relative density.
The density of a fluid is also referred to as Relative Density.
Water has a density of 998 kg/m 3 at a temperature of20℃. The standard unit of density is kg per cubic m. Density pĪ fluid’s density is calculated by dividing the mass of the fluid by the volume of the fluid. The kilogram (kg) is the standard unit of mass in the SI system of units, while the cubic meter is the standard unit of volume and the second is the standard unit of time. The kilogram per cubic m unit of measurement is also used to express density (in m-kilogram-second or SI units) Viscosity and Density Water, for example, has a density of 1 grams per cubic cm, but the density of the Earth is 5.51gm per cm. The density of a substance is usually expressed in grams per cm. Density is calculated using the formula d=M/V, where d represent density, M is mass and V is volume. The mass of a material substance per unit volume is called Density. The term “viscosity” refers to the resistance to flow. Nowadays International Standard (SI) units are used as a global measurement system.The resistance of a fluid (liquid or gas) to a change in shape or movement of adjacent sections relative to one another is called viscosity. A huge improvement in civilization, It necessary to improve measuring standards. Due to this a major problem everyone is facing while doing trading between the countries. We use these systems for measure distances, volume, weight, speed, area etc. In history, there were lots of measuring systems developed but mostly used imperial, the metric system of measurement. This type of measurement is not accurate cause different in size of the arm & finger for different people & some of the countries still using it. The foot, finger is a subdivided shorter unit of a length. For measuring length used forearm, hand, foot & finger as a unit. In history for measurement people used the human body as a tool.
It is essential to use standard measurement in every field that everyone to be sure that they not get cheated. As technology is growing day by day so we need a highly accurate and easy convenient global measuring system in each and every field. We use measurement in science, engineering, business trading, personal life, education, and more other fields. Measurement is the most important aspect of our life.
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