Pascal Second is a unit of
SI unit of Dynamic viscosity is Pascal Second or Ns/m2 or Poise SI unit of Kinematic viscosity is Stokes or m2/sec 1 stoke = 10^(-4) m2/s 1 poise = 0.1 pa.s
An ideal fluid is
Ideal fluid is incompressible and have no viscosity. Onlu imaginary Fluid
The unit of Kinematics viscosity is
1 stoke = 0.01 cm2/sec = 0.0001 m2/sec
If the dynamic viscosity of a fluid is 0.5 and specific gravity is 0.5, then the Kinetic viscosity of the fluid in stoke is
Kinematic viscosity = DynamicViscosity/SpecificGravity = 0.5/0.5 =1
The viscosity of a gas
Viscosity for gas increases with increase in temperature. Viscosity for liquid increases with decrease in temperature.
Newton's law of viscosity relates
T=u.du/dy
The rise of liquid of specific weight γ in a capillary tube of radius r is given by, where σ is the surface tension of the liquid
The intensity of pressure developed by surface tension of 0.075 N/m in a droplet of water of 0.075 mm diameter is
ΔP = 2σ/d for jet ΔP = 8σ/d for soap bubble ΔP = 4σ/d for droplet = 4 x 0.075/0.075 x 10^-3 = .004 N/mm2 = 0.4 N/cm2
Surface tension of water
1 kilo Pascal is equal to
1 Pascal = 1 N/m2 Kilo = 10^3 1 kilo Pascal = 1000 N/m2
Abe liquid has greater Cohesion than adhesion with the solid, then the liquid in the capillary tube will
Capillary fall if Cohesion is greater than adhesion. Rise if Adhesion>cohesion
Examine the following for statements 1. Surface tension is due to Cohesion only 2. Capillarity is due to adhesion only 3. Surface tension is due to both Cohesion and adhesion 4. Capillarity is due to both Cohesion and adhesion Of the following statements are true
Pressure of 200 kPa is equivalent to a head of X metres of carbon tetrachloride of relative density 1.59 where x is equal to
Density = 1.59*water density = 1590 kg/m3 P = pgh 200x10^3 = 1590*9.81*h h = 12.82 m