Numerical Investigation of Heat Transfer for Laminar and Turbulent Flow over Ribbed Walls
Onur Yemenici1, Ali Sakin2
1Onur Yemenici, Mechanical Engineering Department, Uludag University, Bursa, Turkey.
2Ali Sakin, TOFAS-FIAT Automotive Factory, Bursa, Turkey.
Manuscript received on July 26, 2013. | Revised Manuscript received on August 17, 2013. | Manuscript published on August 30, 2013. | PP: 163-166 | Volume-2, Issue-6, August 2013.  | Retrieval Number: F2013082613/2013©BEIESP

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Abstract: A numerical investigation is conducted flows over heated ribbed walls under the effect of the Reynolds number and rib height. Laminar and turbulent flow with constant thermophysical properties is assumed for air at two values of the initial streamwise Reynolds number of 2.7×105 and 3.4×106 . The finite- volume-method is employed to solve the governing equations, coupled with the k─ turbulence model with near-wall treatment. The results indicate that the presence of the ribs can effectively enhance the heat transfer. The heat transfer enhancement increased rib height and become more pronounced in laminar than that of turbulent flows.
Keywords: Heat transfer enhancement, Flow separation, Ribbed wall, laminar flow, Turbulent flow.