Classify of Parameters WHU 区无法显示该图片 D=LTpMr Geometrical parameters: a+0; B=r=0 Movement parameters:尸≠0;y=0 Dynamical parameters 7≠O Non-dimension Parameters a=B=y=0
WHU Classify of Parameters Geometrical parameters: Movement parameters: Dynamical parameters: Non-dimension Parameters: [ ] [ ] M x = L T 0; = = 0 0; = 0 0 = = = 0
WHU Units of si Length: m; cm; mm; km Time: s: h: d Mass: kg: g: mg: t Force:N:KN。 21'=2.54cm;1t=12=30.48cm 21Ib=45359g
WHU Units of SI Length: m; cm; mm; km… Time: s; h; d… Mass: kg; g; mg; t… Force: N; KN… *1'=2.54cm; 1ft=12'=30.48cm *1Ib=453.59g
WHU 1 4 Fluid Mass and Weight 1. Density p The density of fluid is mass per unit volume。 The density of fluid changes in temperature and pressure Unit ofp: kg/m3: g/m3: ke/cm3 o]=[N2]
WHU 1.4 Fluid Mass and Weight 1. Density The density of fluid is mass per unit volume. The density of fluid changes in temperature and pressure. Unit of : kg/m3 ; g/m3 ; kg/cm3 … [ ] [ ] −3 = ML
Density of Water WHU Density of liquids varies small in 84p=100g pressure and temperature The density of water can be as constant 60 P=1000/g/m3 tmperature℃ I FIGURE 1.1 Density of water as a function of temperature
WHU Density of Water Density of liquids varies small in pressure and temperature. The density of water can be as constant. 3 =1000k g / m
WHU 2. Specific Weight r The specific weight of fluid is weight per unit volume, it changes in pressure and temperature. Unit of y: N/m3: KN/m3 Ly=Ml T -pg
WHU 2. Specific Weight The specific weight of fluid is weight per unit volume, it changes in pressure and temperature. Unit of : N/m3 ; KN/m3 = g [ ] [ ] −2 −2 = ML T