<![CDATA[This study aimed to determine the comb configuration that provides the most uniform flow distribution with low turbulence and pressure loss. Four comb configurations, namely circular, square, 3 mm-diameter hexagonal, and 6 mm-diameter hexagonal configurations, were analyzed using Autodesk Computational Fluid Dynamics under steady-state conditions with an inlet velocity of 30 m/s. We evaluated flow characteristics based on mean velocity, velocity standard deviation, coefficient of variation, uniformity index, turbulence intensity, and pressure drop. With a test-section hydraulic diameter of 89 mm, the Reynolds number of the main flow was calculated as 1.81 × 10⁵. The results showed that the 6 mm-diameter hexagonal comb performed best, with a mean velocity of 29.982 m/s, a velocity standard deviation of 0.517 m/s, a coefficient of variation of 1.725%, a uniformity index of 99.281%, a turbulence intensity of 0.608%, and a pressure drop of 0.592 kPa. This configuration produced the most uniform velocity distribution, low velocity fluctuation and turbulence intensity, and low pressure loss. Therefore, the 6 mm-diameter hexagonal comb was selected as the best configuration.]]>
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