ABSTRACT
This paper investigates turbulence characteristics and the parameters controlling the turbulent incompressible flow of a double-sided lid-driven cavity. The effects of varying Reynolds numbers (1⋅104 ≤ Re ≤ 2⋅105), speed ratios (0.05 ≤ S ≤ 1.0), and aspect ratios (0.5 ≤ K ≤ 2.0) on the turbulent quantities, such as kinetic energy, k, dissipation, ε, turbulent viscosity, μt, are analyzed. The k-ε turbulence model equations are solved using the FVM-based SIMPLE algorithm. Taguchi’s approach uses an L16 orthogonal array to determine the optimal cavity parameters. The significance of the considered factors is estimated using the analysis of variance (ANOVA) method. The present study reveals that the turbulent quantities are significantly reduced by increasing the aspect ratio, speed ratio, and Reynolds number. Taguchi analysis suggests that the optimal fluid-flow rate is attained by combining S = 0.05, K = 0.5, and Re = 2⋅105. The ANOVA analysis shows the sig¬nificant percentage contribution for parameters S and Reynolds number, which are approximately 62.29% and 30.21%, respectively. From the regression equation, νt,avg has a positive relationship with both K and Reynolds number but a negative relationship with S.
KEYWORDS
PAPER SUBMITTED: 2023-09-10
PAPER REVISED: 2024-02-05
PAPER ACCEPTED: 2024-02-07
PUBLISHED ONLINE: 2024-03-10
THERMAL SCIENCE YEAR
2024, VOLUME
28, ISSUE
Issue 4, PAGES [3219 - 3233]
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