EML 3015C Thermal Fluids I Fall 2002Lab Assignment # 3 (Sept. 18, 2002)EML 3015C Thermal Fluids I Fall 2002Lab Assignment # 3 (Sept. 18, 2002)1. Water is draining from a large tank with a cross-sectional area of 1 m2 through a smallhole with an exit area of 0.01 m2 (a) Determine the velocity and mass flow rate of the water being discharged from the bottom hole. (b) Determine how fast the water levelis dropping at this instant, i.e, what is dh/dt. Note: The pressure at the surface of water is indicated by the manometer.Airdensity very smallwater=1000 kg/m30.1 mh=1 mMercury=13,600 kg/m32. Air flows through a straight, 0.3m diameter, smooth pipe that is 50 m long. The air flow rate is 0.6 m3/sec. If the pressure at both ends is the same, determine how high is the entrance above the exit.3. Hot water flows steadily into the water tank with a constant mass flow rate of 8 kg/s and a constant temperature of 120 C. Initially, the tank contains cold water of 20 C as shown. The tank has a constant cross-sectional area of 0.2 m2. (a) Use mass conservation concept, determine the mass inside the tank, m, as a function of time, m=m(t). (b) Use energy balance concept, determine and plot the water temperature (T) inside the tank as a function of time. Assume the hot water mix instantaneously with the cold water inside the tank and no heat losses. T t T CO( ) 0 200.5 mAtank = 0.2
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