Numerical Investigation of the Hydrothermal Performance of Rectangular and V-Shape Vortex Generators in a Square Channel
DOI:
https://doi.org/10.37934/cfdl.17.9.104126Keywords:
Baffled channel, pitch ratio, blockage ratioAbstract
The present work aims to study the effects of rectangular and V-shape baffles on enhancing the heat transfer in rectangular channels. Baffles are passive vortex generator techniques that enhance heat transfer in thermal systems. The study intends to use CFD to investigate the two different shapes of vortex generators under various design parameters. Heat transfer and pressure drop features in a square channel for Reynolds numbers ranging from 700 to 2100 will be analysed. The investigated baffles configurations are six rectangular baffles located on the bottom wall of the channel and six V-shape baffles located on the top wall of the channel. The effect of spacing between the baffles represented by spacing to channel height ratio (pitch ratio) is tested for values 1.5 and 3. Also, the impact of the baffle height, represented by the baffle’s height-to-channel height ratio (blockage ratio), is tested for values 0.3 and 0.4. The main finding from this investigation is that the highest thermal performance factor for rectangular and V-shape baffles is 2.68 and 2.05, respectively, which is reported at a pitch ratio of 3 and a blockage ratio of 0.4.
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