What is MU in Reynolds number?
What is MU in Reynolds number?
μ (mu) is the dynamic viscosity of the fluid (Pa·s = N·s/m2 = kg/(m·s)), ν (nu) is the kinematic viscosity (ν = μρ) (m2/s), ρ (rho) is the density of the fluid (kg/m3), W is the mass flowrate of the fluid (kg/s).
What is viscosity and its unit?
Viscosity is a measure of a fluid’s resistance to flow. The SI unit of viscosity is poiseiulle (PI). Its other units are newton-second per square metre (N s m-2) or pascal-second (Pa s.) The dimensional formula of viscosity is [ML-1T-1].
What is rho in fluid dynamics?
The density of a fluid, designated by the Greek symbol (ρ, rho), is defined as its mass per unit volume. Density is typically used to characterize the mass of a fluid system. In the SI system units of density are kg/m3.
Is MU dynamic or kinematic viscosity?
Equation (1) is known as the Newtons Law of Friction. Water at 20.2oC (68.4oF) has the absolute viscosity of one – 1 – centiPoise….Dynamic (absolute) Viscosity.
| Liquid | Absolute Viscosity *) (N s/m2, Pa s) |
|---|---|
| Air | 1.983 10-5 |
| Water | 10-3 |
| Olive Oil | 10-1 |
| Glycerol | 100 |
Is poise unit of viscosity?
A poise is the centimetre-gram-second (cgs) unit of viscosity. It expresses the force needed to maintain a unit… 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.
How do I calculate specific weight?
Multiply the density by the acceleration of gravity (9.81) to calculate the specific weight. In our example, the specific weight is 840 x 9.81 = 8,240.4.
What is specific weight in fluid mechanics?
In fluid mechanics, specific weight represents the force exerted by gravity on a unit volume of a fluid. For this reason, units are expressed as force per unit volume (e.g., N/m3 or lbf/ft3). Specific weight can be used as a characteristic property of a fluid.
How do you find the unit of viscosity?
Units of Viscosity Using SI units, since shear stress was in N/m2 and shear rate was in (m/s)/m = 1/s, then dynamic viscosity has units of Ns/m2 = Pa s (pascal-second). However, the most common unit of viscosity is the dyne-second per square centimeter (dyne s/cm2) where 1 dyne = 10-5 N.
What is fluid unit weight?
Specific weight, sometimes referred to as unit weight, is simply the weight of fluid per unit volume. It is usually denoted by the Greek letter γ (gamma) and has dimensions of force per unit volume.
What is the weight of fluid per unit volume?
Density is called a Mass per unit volume of a fluid. This is denoted by symbol ρ (rho) and the unit of mass density is (kg/m3). The density of liquid may be constant but the density of gases changes with the variation of temperature and pressure. (The Density of water is 1000 kg/m3) or (we can say 1 g/cm3).
