WHU Specific Weight of Water The specific weight of water can be as a constant too y=9800Nm
WHU Specific Weight of Water The specific weight of water can be as a constant too. 3 = 9800N / m
L6 Viscosity WHU 1. Viscosity Fluid has a physical character which resist shear deform (or relative motion it is called viscosity Fluid motion can cause shearing stresses, that bring about energy
WHU 1.6 Viscosity 1. Viscosity: Fluid has a physical character which resist shear deform (or relative motion), it is called viscosity. Fluid motion can cause shearing stresses, that bring about energy loss
2. Experiment of Viscosity WHU In 1686. Newton got results by experiment: b FIGURE 1.2 (a) Defor. 8B mation of material placed between Fixed plate two parallel plates. (b) Forces acting on upper plate
WHU 2. Experiment of Viscosity In 1686, Newton got results by experiment: b U P A
3. Newton's Law of Viscosity WHU Give a proportion coefficient P=L In which u is dynamic viscosity, it varies in fluid kinds, temperature
WHU 3. Newton’s Law of Viscosity Give a proportion coefficient In which is dynamic viscosity, it varies in fluid kinds, temperature. dy du P = A dy du =
4. Dynamic viscosity of Fluids WHU Unit of A:N·s/m2;Pas LU=LML T Dynamic viscosity is the fluid property that relates shearing stress and fluid motion
WHU 4. DynamicViscosity of Fluids Unit of Dynamic viscosity is the fluid property that relates shearing stress and fluid motion. : N s/ m ; Pas 2 [ ] [ ] −1 −1 = ML T