In this paper, Micro-Particle Image Velocimetry (Micro-PIV) system has been used to visualize the flow properties of deionized water flowing across circular, ellipse and diamond micro pin-fin arrays with Reynolds numb...
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In this paper, Micro-Particle Image Velocimetry (Micro-PIV) system has been used to visualize the flow properties of deionized water flowing across circular, ellipse and diamond micro pin-fin arrays with Reynolds number situated between 100 and 400. While Fluent 15.0 is used to simulate the velocity distribution, streamline patterns and temperature distribution around micro pin-fin arrays. Micro-PIV results and simulation outcomes have been compared to investigate the flow and heat transfer characteristics of micro pin-fin arrays. Among three types of pin-fins, backflow occurs firstly at the tail of circular pin-fins and wake vortices form gradually, then the structure of the vortex gradually lengthens. The velocity and pressure transformation along the single pin-fin is a decompression acceleration region at first and turns into a pressurization deceleration from the middle to the tail of pin-fin. The area of higher temperature region of vortices at the back of circular pin-fin is the largest, which results in better heat transfer performance.
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