@Article{hmt.13.29,
AUTHOR = {Riyadh S. Al-Turaihi

, Doaa Fadhil, Azher M. Abed},
TITLE = {EFFECT OF SEMI-CIRCLE RIB ON HEAT TRANSFER COEFFICIENT  IN A RECTANGULAR CHANNEL},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {13},
YEAR = {2019},
NUMBER = {1},
PAGES = {1--7},
URL = {http://www.techscience.com/fhmt/v13n1/53163},
ISSN = {2151-8629},
ABSTRACT = {In this paper an experimental and numerical analysis has been conducted to study the effect of heat transfer and filed flow of two-phase flow (water 
and air) through a rectangular ribbed channel. The study has involved the several values of heat flux (120,140,160 Watts), air and water superficial 
velocity (1.096, 1.425, 1.644, 1.864, and 2.193 m/s) and (0.0421, 0.0842, and 0.1474 m/s), respectively. The distribution of temperature along the 
channel was photographed using thermal camera and compared with numerical results . The experimental test system was fabricated of vertical 
rectangular channel with cross section of (0.08m × 0.03m) and a length (0.7 m) to analyze the behavior of the mixture (water-air) over the heated 
plate (semi-circle ribs ). The computational fluid dynamics CFD software was utilized to simulate the governing equations with initial and boundary 
conditions. Results found that the ribbed channel give the high heat transfer rate compared to the smooth channel. The percentage deviation between 
the experimental and numerical data is (1.0% - 6.0% ). The results proved that the flow is growing to become turbulent, eddies develop about the 
heated plate (rib), the temperature at the outlet decreases and heat transfer coefficient improved by adding ribs, it also improved when the velocities 
of the flow increased.},
DOI = {10.5098/hmt.13.29}
}