On the performance of linear and nonlinear turbulence models in various jet flow applications

PIV measurements of a plane wall jet in a confined space at transitional slot Reynolds numbers

“…After 1983, numerical work on wall jets has been performed by, among others, Conlon and Lichter (1995), Gogineni et al (1999), Davidson et al (2000), Bhattacharjee and Loth (2004), Wernz and Fasel (2007), Ahlman et al (2009) and Balabel and El-Askary (2011). Note that unless mentioned otherwise, all studies mentioned above and below were conducted for wall jets in a more or less quiescent flow, that is, a flow domain that is large enough to prevent or minimize the disturbing effects of a secondary flow, which is in contrast to the studied flow pattern presented in this paper (Fig.…”

CFD simulation of straight and slightly swirling turbulent free jets using different RANS-turbulence models

“…Time-dependent effects have been neglected and only stationary CFD simulations have been performed (as suggested by [7] and [13] and verified by [16]). Solution convergence has been evaluated by monitoring scaled residuals and a number of flow parameters at relevant points of the computational domain.…”

“…Vouros et al [15] examined the influence of a circular obstacle in the exit region of a turbulent free jet (Re up to 65,000) on velocity and turbulence fields both experimentally and numerically (k-ε and RSM). Several linear and nonlinear k-ε have also been used by Balabel et al [16] for the simulation of three different jet flow applications (free jet, wall jet and impinging jet). Comparison with experimental data from literature showed that description of the simple free jet is covered reasonably well by classical k-ε model while the two more complex jet flows require the application of non-linear turbulence models.…”

Evaluation of RANS turbulence models in simulating the corner separation of a high-speed compressor cascade

“…However, the shortcomings of non-linear eddy viscosity models are also unavoidable (Tucker, 2013). Through a careful numerical investigation, it is concluded that a linear turbulence model could provide good results in a simple jet flow, whereas in a complicated jet flow, a non-linear model would be more favorable (Balabel & El-Askary, 2011). In contrast, compared with linear turbulence models, it has also been pointed out that no significant modifications are observed when using the non-linear model to simulate a turbine flow (Kulisa et al, 2006).…”

“…However, the present encouraging results are obtained in the lowflow regime and constrained to the one-equation SpalartAllmaras model. Non-linear eddy viscosity models have also been used, with better simulation accuracy (Balabel & El-Askary, 2011;Craft, Launder, & Suga, 1996;Gatski & Speziale, 1993;Kulisa & Dano, 2006;Mani, Babcock, Winkler, & Spalart, 2013;Mehdizadeh, Temmerman, Tartinville, & Hirsch, 2012). However, the shortcomings of non-linear eddy viscosity models are also unavoidable (Tucker, 2013).…”