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- W4308786985 abstract "Abstract The present work studied various models for predicting turbulence in the problem of injecting a fluid microjet into the boundary layer of a turbulent flow. For this purpose, the one-equation Spalart-Allmaras (SA), two-equation k-ε and k-ω, multi-equation transition k-kL-ω, transition shear stress transport (SST), and Reynolds stress models were used for solving the steady microjet into the turbulent boundary layer, and their results are compared with experimental results. A comparison of the results indicated that the steady solution methods performed sufficiently well for this problem. Furthermore, it was found that the four-equation transition SST model was the most accurate method for predicting turbulence in this problem. This model predicted the velocity along the x-axis in near- and far-jet locations with about 1% and 5% errors, respectively. It also outperformed the other methods in predicting Reynolds stresses, especially at the center (nearly 5% error). Moreover, the modified four-equation transition SST model has improved the system’s performance in predicting the studied parameters by utilizing Sørensen correlations in predicting 𝑅𝑒 𝜃𝑡 (the transition momentum thickness Reynolds number), 𝐹 𝑙ength (an empirical correlation that controls the length of the transition region), and 𝑅𝑒𝜃𝑐 (the critical Reynolds number where the intermittency first starts to increase in the boundary layer)." @default.
- W4308786985 created "2022-11-15" @default.
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- W4308786985 date "2022-11-11" @default.
- W4308786985 modified "2023-09-26" @default.
- W4308786985 title "Comparison and Modification of Various Turbulence Models for Analysis of Fluid Microjet Injection into the Boundary Layer over a Flat Surface" @default.
- W4308786985 doi "https://doi.org/10.21203/rs.3.rs-2241386/v1" @default.
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