TY - JOUR

T1 - Effects of thermal induced buoyancy forces on the vortex shedding of a circular cylinder

AU - Singh, Sumit

AU - Chandar, Dominic

PY - 2016/8

Y1 - 2016/8

N2 - Thermal effects on the vortex shedding of a circular cylinder are studied numerically under laminar flow conditions for flows along (parallel but in a direction opposite) and perpendicular to the direction of gravity. When the flow is parallel to the direction of gravity, the process of natural convection due to heating the cylinder helps reduce the vortex shedding. However, when the flow is set perpendicular to the direction of gravity, vortex shedding cannot be suppressed only by heating the surface of the cylinder. To analyze the suppression mechanism in this case, the cylinder is divided into four equal quadrants and each quadrant is heated to observe the effect on shedding behavior and the force coefficients. Results show that by merely heating the cylindrical quadrants, vortex shedding decreases but cannot be completely eliminated. However, simultaneous heating and cooling of different cylindrical quadrants can result in complete suppression of vortex shedding accompanied by drag inversion.

AB - Thermal effects on the vortex shedding of a circular cylinder are studied numerically under laminar flow conditions for flows along (parallel but in a direction opposite) and perpendicular to the direction of gravity. When the flow is parallel to the direction of gravity, the process of natural convection due to heating the cylinder helps reduce the vortex shedding. However, when the flow is set perpendicular to the direction of gravity, vortex shedding cannot be suppressed only by heating the surface of the cylinder. To analyze the suppression mechanism in this case, the cylinder is divided into four equal quadrants and each quadrant is heated to observe the effect on shedding behavior and the force coefficients. Results show that by merely heating the cylindrical quadrants, vortex shedding decreases but cannot be completely eliminated. However, simultaneous heating and cooling of different cylindrical quadrants can result in complete suppression of vortex shedding accompanied by drag inversion.

U2 - 10.1016/j.icheatmasstransfer.2016.05.012

DO - 10.1016/j.icheatmasstransfer.2016.05.012

M3 - Article

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

SN - 0735-1933

ER -