An improved near-wall treatment for turbulent channel flows

作者：El Gharbi Najla^*; Absi Rafik; Benzaoui Ahmed; Bennacer Rachid

来源：International Journal of Computational Fluid Dynamics, 2011, 25(1): 41-46.

DOI：10.1080/10618562.2011.554832

• near-wall treatment
• turbulent kinetic energy
• channel flow

The success of predictions of wall-bounded turbulent flows requires an accurate description of the flow in the near-wall region. This article presents a comparative study between different near-wall treatments and presents an improved method. The study is applied to fully developed plane channel flow (i.e. the flow between two infinitely large plates). Simulations were performed using Fluent. Near-wall treatments available in Fluent were tested: standard wall functions, non-equilibrium wall function and enhanced wall treatment. A user defined UDF), based on an analytical profile for the turbulent kinetic energy (Absi, R., 2008. Analytical solutions for the modeled k-equation. ASME Journal of Applied Mechanics, 75 (4), 044501), is developed and implemented. Predicted turbulent kinetic energy profiles are presented and validated by DNS data.

• 出版日期2011