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aĀ» \lalāt āHABā lV Fluid *er Problem 1: Intravenous infusions are usually driven by gravity by hanging the ļ¬uid bottle at sufļ¬cient height to counteract the blood pressure in the vein and to force the ļ¬uid into the body. The higher the bottle is raised, the higher the ļ¬ow rate of the ļ¬uid will be. 5, (a) If it is observed that the ļ¬uid and the blood pressures balance each other when the
bottle is 1.2 m above the arm level, determine the gage pressure of the blood. _ 6 (b) If the gage pressure of the ļ¬uid at the arm level needs to be 20 kPa for sufļ¬cient ļ¬ow 7ā rate, determine how high the bottle must be placed. Take the density of the ļ¬uid to be 1020 kg/m3. bo'l'He ā5 Problem 2: A well-stirred tank of volume V= 2 In3 shown in ļ¬gure below is initially ļ¬lled with brine, in
which the initial concentration of sodium chloride at t = 0 is co = 1 kg/m3. Subsequently, a
ļ¬ow rate of Q = 0.01 m3/s of pure water is fed steadily to the tank, and the same ļ¬ow rate of
brine leaves the tank through a drain. Additionally, there is an ample supply of sodium
chloride crystals in the bottom of the tank, which dissolve at a uniform rate of m = 0.02 kg/s.
It is reasonable to suppose that the volume of brine in the tank remains constant. :6 (a) Derive an expression for the subsequent concentration of sodium chloride 0 in terms of
\ co, m, t, Q, and V. \r, (b) Make a sketch of c versus t and label the main features. to (c) Assume an inexhaustible supply of crystals, what will the concentration c of sodium
chloride in the tank be at t = 0, 10, 100, and 00 seconds? Carefully deļ¬ne the system on which you perform a transient mass balance. 9ā Inlm Aā our y/ CROOSe 4he $ds+Ā¢m 1Ā° evācluola āHāe :sdāel 59H" V 1 m3
Kn ļ¬he 4onlc- Tkm I 'ā
pevf'olm a ā3k- bābācļ¬ Q3 : 1 h: IM (3'- msSL 5Ā°ā - ā Separate variables X 7" ...
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- Spring '09
- Sodium chloride, Gage Pressure, arm level