Fluid structure interaction and heat transfer enhancement with dynamic flexible flow modulator

CFD analysis of heat transfer enhancement by wall mounted flexible flow modulators in a channel with pulsatile flow

“…Displacement equation: where denotes the stress tensor and represents the body force vector acting on the mass of the modulator. Since the FFM is sufficiently thin and free from the effect of buoyancy force, the associated body force can be ignored [ 8 , 10 ]. Besides, indicates the velocity of the moving coordinate, denotes the fluid velocity vector, and indicates the solid displacement vector.…”

“…Therefore, to counteract this pressure drop effect, researchers turned to FSI investigations using flexible flow modulators. Inevitably, a multitude of flexible devices, including flexible baffles [ 8 ] and oscillating flexible fins [ [9] , [10] , [11] , [12] , [13] ] were added in stationary/lid-driven enclosures in recent years for comprehensive study. Thermal enhancement up to 101.69%, 200%, 280%, 8.5% and 3.29% respectively was possible from the systems of [ [8] , [9] , [10] , [11] , [12] ] when compared to the rigid modulator systems.…”

“…Inevitably, a multitude of flexible devices, including flexible baffles [ 8 ] and oscillating flexible fins [ [9] , [10] , [11] , [12] , [13] ] were added in stationary/lid-driven enclosures in recent years for comprehensive study. Thermal enhancement up to 101.69%, 200%, 280%, 8.5% and 3.29% respectively was possible from the systems of [ [8] , [9] , [10] , [11] , [12] ] when compared to the rigid modulator systems. Hence, these studies established that flexible flow modulators boosted heat transfer by stimulating vortex formation which could be attributed to their inertial effects.…”

Heat transfer enhancement of a cylinder by flexible fins in turbulent flow

“…Zhong et al [35] examined the e ects of the inverted ags attached to the walls of a channel on the heat transfer rate and concluded that these types of ags could signi cantly increase the Nusselt number of heat sinks. Hakim et al [36] suggested a numerical method for FSI problem under the e ect of an elastic ow regulator. In their study, both FSI and heat transfer rate signi cantly increased by the external vibration and elasticity of the ow regulator.…”