5. A sprue is 200 mm long. The velocity of the molten metal at the top of the sprue is 0.1 mm/sec. The sprue has a diameter of 10 mm at the bottom. The total cavity of the "runner system + mold" is 1.2 liters. The viscosity of the molten metal is 0.002 Pa. s and density 2000 kg/m^3.

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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5. A sprue is 200 mm long. The velocity of the molten metal at the top of the sprue is 0.1 mm/sec.
The sprue has a diameter of 10 mm at the bottom. The total cavity of the "runner system +
mold" is 1.2 liters. The viscosity of the molten metal is 0.002 Pa. s and density 2000 kg/m^3.
Transcribed Image Text:5. A sprue is 200 mm long. The velocity of the molten metal at the top of the sprue is 0.1 mm/sec. The sprue has a diameter of 10 mm at the bottom. The total cavity of the "runner system + mold" is 1.2 liters. The viscosity of the molten metal is 0.002 Pa. s and density 2000 kg/m^3.
a) What is the velocity of the molten metal at the bottom of the sprue in [mm/s]?
b) What is the flow rate in [mm3/s]?
c) How much time does it take to fill the mold?
d) For a proper design, what should be the diameter of the sprue at the middle (corresponding
to z= 200/2 mm) of the sprue?
e) Is the flow laminar, mixed, or turbulent at the bottom of the sprue?
h+
Pg 2g
constant
Q = Av, = Av,
A
vD
Re
Activate
TST = CG"
Go to Setti
Transcribed Image Text:a) What is the velocity of the molten metal at the bottom of the sprue in [mm/s]? b) What is the flow rate in [mm3/s]? c) How much time does it take to fill the mold? d) For a proper design, what should be the diameter of the sprue at the middle (corresponding to z= 200/2 mm) of the sprue? e) Is the flow laminar, mixed, or turbulent at the bottom of the sprue? h+ Pg 2g constant Q = Av, = Av, A vD Re Activate TST = CG" Go to Setti
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