Abstract
This paper presents an original concept of using high flexible flapping vortex generator in a heat sink for airside heat transfer augmentation. The proposed thin winglet, made with an elastic sheet, is responsible for increasing the cooling rate and mixing quality performance in laminar convection airflow. This study focuses on the excessive bending of the flapping winglet and reducing its blockage effect and pressure drop. This novel concept is demonstrated using a numerical simulation of the flow field with a coupled Fluid-Solid-Interaction technique in transient conditions. The continuity, momentum, and energy equations for forced convection airflow are solved by the finite element method using the COMSOL Multi-physics. Numerical results reveal high amplitude for the flapping vortex generator while under a large deformation and bending. This behavior leads to flow mixing with a small blockage effect due to the deformed aerodynamic shape of the winglet. The present findings show that the high flexible winglet enhances the rejected heat by 100%, with a 33% decrease in pressure drop compared to the rigid vortex generator at the same air velocity.
Highlights
In recent years, several countries have experienced limited freshwater due to the fast-growing population
A new idea of employing a very high elastic vortex generator to increase the rate of heat rejection in an airside heat sink with low-pressure loss was examined by a theoretical method
Numerical results revealed that the vortex generation technique enhances the convection heat transfer by introducing the flow vortices that swept out the temperature boundary layer and cause thermal mixin g in the recirculated domain
Summary
Several countries have experienced limited freshwater due to the fast-growing population. It is expected that the vibration of VG under these conditions enhances the convective heat transfer with small mechanical energy loss To materialize this aim, the present study introduces a highly elastic thin winglet as a vortex generator inside a 2-D laminar convection airflow in a heat sink with constant fin temperature to have a more cooling rate. Validation In the present study for validation, as a test case, a lamin ar convection airflow in a rectangular duct with two heated walls and under the presence of a thin elastic winglet attached to the lower wall was simulated This problem was solved by Li et al [7] with the numerical method.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
