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| Comparison between numerical computations and measurements by LDV for fluid flow in rectangular duct systems Kyung Hwan Kim
The Journal of Mechanical Science and Technology, vol. 22, no. 9, pp.1800-1807, 2008
Abstract : Fluid flows in rectangular duct systems are measured by using the laser-Doppler velocity meter and computed by commercial
software of Star-CD for comparisons between flows. Three rectangular systems are investigated in this study: a rectangular
duct with a 90 degree bent elbow, a rectangular duct with two branches, and a rectangular duct in the middle of which a
circular cylinder is located. These investigations show that the numerical solutions satisfactorily predict design factors: for
example, the K -factor for an elbowed duct, the distribution ratio of flow rates into each branch from a main duct, and the
Nusselt number around the circular duct. However, there are some disagreements in the velocity profile and turbulent kinetic
energy at each cross section of the duct systems.
Keyword :
90 degree banded elbow; Branch duct; Circular cylinder; Heat transfer; Turbulent kinetic energy; Numerical computation; Experimental
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