Heat and Mass Transfer Research Journal (HMTRJ)

Research Article

A numerical study on enhancement in convective heat transfer from a forcibly oscillating cylinder perpendicular to stream direction

M. Saghafian and F. Baratchi

Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 84156, Iran

Submitted: February 3, 2018; Accepted: July 5, 2018

Abstract

In this paper we use Moving Overset Grids method and study the effect of forced oscillations of a circular cylinder on heat transfer process. In the first part, vibrations of a cylinder with A/D=0.25 and A/D=0.4 are simulated and the effects of driving frequency and lock-in condition on Nusselt number are studied. In the second part, the effects of changes in Reynolds number, amplitude of oscillation and vortex shedding modes, on Nusselt number are investigated.

Keywords

heat transfer; Nusselt number; forced vibration; lock-in; vortex shedding modes.

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