Review and numerical investigation of the mean flow features of a round turbulent jet in counterflow

Abstract

A turbulent jet in counterflow is a lesser-studied jet configuration which exhibits great potential for mixing applications in sustainable energy production. In this paper, a comprehensive literature review of the research in counter-flowing jets is performed. Experimental and numerical results for mean and turbulent quantities are reviewed, and similarities and differences between datasets are discussed. Additionally, large eddy simulations (LESs) are carried out in order to study a turbulent jet in counterflow at several jet-to-counterflow velocity ratios (α = 2.2, 3.4, 5.1). The effect of two different jet inflow conditions is investigated. The LES results are directly compared to the available literature, and the subsequent analysis sheds light on the differences seen in the review. Finally, a set of recommendations and best practices are provided in order to aid future studies of jets in counterflow.

Cylinder wake flow in confined channel and its active control by sweeping jets

“…However, as 𝐶 𝜇 increases, the forward flowfield becomes significantly asymmetric; SJ deflects downward (i.e., −𝑦 direction), and this deflection becomes more significant with the increase in 𝛽. This asymmetry is attributed to large radial oscillations caused by the strong shear interaction between the attributed to and the counterflow, which has been widely discussed in similar studies on turbulent jets in counterflows (e.g., Rovira et al, 2020Rovira et al, , 2021. In confined flow control applications, this asymmetry may exacerbate the blocking effect of the gap flow and lead to an increase in unbalanced forces on the controlled bluff body.…”

Quasi-direct numerical simulations of the flow characteristics of a thermal plasma reactor with counterflow jet

“…The flow regimes have been identified due to the impingement of two fluids at room temperature [18][19][20][21][22][23][24][25][26]. Linear stability analysis was used to reveal the impingement of the laminar isothermal flows at a finite Reynolds number [24].…”