Enhanced Transient Heat Transfer From Arrays of Jets Impinging on a Moving Plate
This article addresses the numerical analysis of single and multiple circular jets impinging perpendicularly on a ﬂat plate for heating and cooling purposes. Computational ﬂuid dynamics (CFD) is used to evaluate heat transfer calculations for different conﬁgurations and different ﬂow boundary conditions. The commercial CFD package FLUENT is employed with various turbulence models. Results for a single jet are validated against experimental data. The SST k − ω turbulence model is compared with the elliptic V2F model, and both were validated against experimental data. Results were obtained for a range of jet Reynolds numbers and jet-to-target distances. Optimization results for the single jet case are validated against experimental data. The SST k −ω and V2F turbulence models succeeded with a reasonable accuracy (within 20% error) in reproducing experimental results. The heat transfer rates from the use of multi-jet conﬁgurations are discussed in the article. Transient heat transfer between multiple jets and a moving plate is more difﬁcult to study due to the changing boundaries but is also very relevant in engineering applications. This article presents full CFD calculations of the transient heat transfer between a bank of circular jets and a moving plate. Design optimization has also been achieved for the single and multiple-jet conﬁgurations.
Three-dimensional (3D) domain with its boundary conditions at two different time steps