Abstract
Unsteady laminar natural convection within a square enclosure with wavy bottom wall embedded with a couple of circular cylinders placed in the vertically symmetric mid-plane is numerically investigated. Present study numerically quests for four different interspacings of the cylinders ranges \(0.1 \le S \le 0.4\) and for Rayleigh number (Ra) in the range of 103–106. The results are discussed based on distribution of isotherms, streamlines, and temporal distribution of surface-averaged Nusselt number (Nus) along with the time-averaged Nusselt number (Nut). The outcome of the investigation infers that heat transfer takes place solely due to conduction up to Ra = 103, whereas the heat transfer shifts the mode from conduction to convection with increase in Ra. Further, Nut is found to increase with increase in S at lower values of Ra. Moreover, for higher values of Ra, the variation of Nut evaluated at the surface of the cylinders shows contrasting features with changing cylinder spacing.
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Deka, D.K., Pal, G.C., Pati, S., Randive, P.R. (2021). Natural Convection from Two Cylinders in an Enclosure with Sinusoidal Bottom Wall: A Numerical Study. In: Pandey, K., Misra, R., Patowari, P., Dixit, U. (eds) Recent Advances in Mechanical Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-7711-6_36
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