Molten aluminum is degassed by gently bubbling a 75%N 2 -25%Cl 2 gas through the melt. The
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Molten aluminum is degassed by gently bubbling a 75%N2-25%Cl2 gas through the melt. The gas passes through a graphite tube at a volumetric flow rate of 6.6x10-5 m3 s-1. Calculate the pressure that should be maintained at the tube entrance if the pressure over the bath is 1.014x105 N m-2 (1 atm). Data: Tube dimensions: L= 0.9 m; inside diameter = 2 mm. Temperature of aluminum melt is 973 K; density of aluminum is 2500 kg m-3. Dynamic Viscosity of the mix at 973K is 2.665E-5 Pa-s
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