Impact of an Elastic Wall on Thermo-Flow Behavior Around a Cylinder Within a Channel

The fluid–solid interaction of forced convective flow around a circular cylinder within a channel is investigated. All the channel surfaces are insulated, and the cylinder has heat transfer with the cold passing flow at a constant temperature. The lower surface of the channel is rigid, while the upper part is elastic. Crossing the flow into the hot surface and vibrating the elastic shell cause the heat transfer rate and the drag coefficient of the cylinder to change. The changes depend on the vibration conditions of the elastic oscillator. It was found that the location of the elastic surface, vibrational amplitude, and frequency are the most significant factors affecting the exit flow temperature of the channel. The variation of main parameters (elastic surface location, amplitude, and frequency) which affect the flow pattern was investigated. Studies at five different Reynolds show that replacing the elastic wall on the cylinder upstream has a more significant effect on increasing heat transfer than the cylinder downstream. The results also indicate a growth in the average Nusselt number and drag coefficient by rising the vibrational amplitude and frequency.