Computational Fluid Dynamics Analysis of Impingement Heat Transfer in an Inline Array of Multiple Jets

Abstract

Amid all convective heat transfer augmentation methods employing single phase, jet impingement heat transfer delivers significantly higher coefficient of local heat transfer. The arrangement leading to nine jets in square array has been used to cool a plate maintained at constant heat flux. Numerical study has been carried out using RANS-based turbulence modeling in commercial CFD Fluent software. The turbulent models used for the study are three different “k-ε” models (STD, RNG, and realizable) and SST “k-ω” model. The numerical simulation output is equated with the experimental results to find out the most accurate turbulence model. The impact of variation of Reynolds number, inter-jet spacing, and separation distance has been considered for the geometry considered. These parameters affect the coefficient of heat transfer, temperature, and turbulent kinetic energy related to flow. The local “h” values have been noticed to decline with the rise in separation distance “H/D.” The SST “k-ω” model has been noticed to be in maximum agreement with the experimental results. The average value of heat transfer coefficient “h” reduces from 210 to 193 W/m2K with increase in “H/D” from 6 to 10 at “Re” = 9000 and S/D of 3. As per numerical results, inter-jet spacing “S/D” of 3 has been determined to be the most optimum value.

CFD analysis of the effects of flow and thermal oscillations in heat transfer of impinging jet

“…Parampreet et al 18 carried out the computational fluid dynamics analysis in an inline array of multiple jets for impingement heat transfer using a turbulence model based on the Reynolds‐averaged Navier–Stokes equation. The higher value of the coefficient of local heat transfer delivers significant impingement heat transfer in jets.…”

Numerical Study of Twin Jets Interactions using Realizable Model

“…CFD software was used to solve a three-dimensional flow situation [16].The studied configuration is formed by nine impinging jets in a square array used to cool a plate maintained at constant heat flux. Numerical code has been executed using three k-ε models and the SST kω model.…”

The Influence of the Discharge Port Structure on the Infrared Characteristics of Underwater Vehicle Thermal Jets

“…When the ratio of jet velocity to environmental velocity was large, the Nussel number increased sharply. Singh.p et al [23] conducted relevant research on porous turbulent jets in the CFD-FLUENT software (Fluent 2020R1, Wuhan, China) and analyzed variations in the flow-related heat transfer coefficients, temperature and turbulent kinetic energy under different discharge port structures and distributions. However, there are still some deficiencies in the study of discharge port structures.…”