Abstract
The complexity of the flow field and heat transfer in jet impingement has led to several studies in order to increase the processes and products performance. Jet impingement is widely implemented, since it ensures high average heat transfer coefficients and the uniformity of the temperature over the target surface. However, the flow generated depends on several parameters related to the jet flow, such as jet velocity and temperature, and the target plate geometry. Complex impinging surfaces are identified in the majority of the applications, such as reflow soldering and cooling of turbines or solar systems. To increase the process efficiency, it is important to fully understand the interactions between the jet and the target surface. Considering the interest of this field, the present study is conducted to investigate the influence of the target surface on heat transfer in a single jet impingement process. To minimize the number of experiments, decreasing time and costs, the implementation of numerical tools is fundamental. In that sense, the impingement of the hot air jet over a flat and non-flat plate was predicted numerically using the ANSYS FLUENT software. The velocity and temperature profile were analyzed and the Nusselt number were compared for both cases. The results show the complexity of the flow generated in the vicinity of the step and the changes of the jet flow structure when it impinges a complex surface.
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Acknowledgments
The first author would like to express her gratitude for the support given by the Portuguese Foundation for Science and Technology (FCT) and the MIT Portugal Program. This work has been supported by FCT – Fundação para a Ciência e Tecnologia within the R&D Units Project Scope: UIDB/00319/2020 (ALGORITMI Center) and R&D Units Project Scope UIDP/04077/2020 (METRICS Center).
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Barbosa, F.V., Teixeira, S.F.C.F., Teixeira, J.C.F. (2020). Numerical Analysis of Single Jet Impinging a Flat and Non-flat Plate. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2020. ICCSA 2020. Lecture Notes in Computer Science(), vol 12253. Springer, Cham. https://doi.org/10.1007/978-3-030-58814-4_34
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