title: ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ»Ð¾ÐµÐ² ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ Ð² ÐºÐ°Ð½Ð°Ð»Ðµ Ñ Ð¿ÐµÑÐ¸Ð¾Ð´Ð¸ÑÐµÑÐºÐ¸ ÑÐ°ÑÐ¿Ð¾Ð»Ð¾Ð¶ÐµÐ½Ð½ÑÐ¼Ð¸ ÑÐµÐ±ÑÐ°Ð¼Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Analysis of mixing layers in a channel with periodically positioned edges
Creators: name: ÐÐµÐ±ÐµÐ´ÐµÐ², ÐÐµÐ½Ð¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2024
Subjects: ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ
ÑÐ»Ð¾Ð¹ ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ
Ð¾ÑÐµÐ±ÑÐµÐ½Ð½Ð°Ñ ÑÑÐµÐ½ÐºÐ°
numerical modiling
turbulent flow
mixing layer
ribbed wall

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ ÑÐ°ÑÑÐµÑÐ½Ð¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÑÐµÐ½Ð¸Ñ Ð² Ð¿Ð»Ð¾ÑÐºÐ¾Ð¼ ÐºÐ°Ð½Ð°Ð»Ðµ Ð² ÑÐ»ÐµÐ´Ðµ Ð·Ð° ÑÐµÐ±ÑÐ¾Ð¼. Ð ÑÐ¾Ð´Ðµ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ñ ÑÐµÑÐ°Ð»Ð¸ÑÑ Ð·Ð°Ð´Ð°ÑÐ¸: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ ÑÐ°Ð·Ð¼ÐµÑÐ½Ð¾ÑÑÐ¸ ÑÐµÑÐºÐ¸ Ð½Ð° Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÐµ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ; Ð¡ÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð², Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ Ð¿ÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð´Ð²ÑÑ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸, Ð¸ Ð¸Ñ ÑÐ¾Ð¿Ð¾ÑÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐ¼Ð¸ Ð´Ð°Ð½Ð½ÑÐ¼Ð¸; ÐÐ½Ð°Ð»Ð¸Ð· Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð¿ÑÐ¾Ð´Ð¾Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ°Ð·Ð¼ÐµÑÐ° ÑÐµÐ±ÑÐ° Ð½Ð° ÑÐµÑÐµÐ½Ð¸Ðµ Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð½Ð°Ð¸Ð»ÑÑÑÐµÐ¹ Ð³ÐµÐ¾Ð¼ÐµÑÑÐ¸Ð¸. Ð§Ð¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸Ð»Ð¾ÑÑ Ð² Ð¿Ð°ÐºÐµÑÐµ Ansys FLUENT. Ð Ð°ÑÑÐµÑÑ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ Ð¿ÑÐ¸ ÑÐ¸ÑÐ»Ðµ Ð ÐµÐ¹Ð½Ð¾Ð»ÑÐ´ÑÐ°, ÑÐ°Ð²Ð½Ð¾Ð¼ Re=37200, Ð¿Ð¾ Ð¼Ð¾Ð´ÐµÐ»ÑÐ¼ k-Ï Standard Ð¸ Spalart-Allmaras. Ð ÑÐ°Ð¼ÐºÐ°Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð±ÑÐ»Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ 5 ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð³ÐµÐ¾Ð¼ÐµÑÑÐ¸Ð¹ - ÐºÐ²Ð°Ð´ÑÐ°ÑÐ½Ð¾Ðµ ÑÐµÐ±ÑÐ¾, ÑÐ´Ð»Ð¸Ð½ÐµÐ½Ð½Ð¾Ðµ Ð² 2 Ð¸ Ð² 4 ÑÐ°Ð·Ð°, Ð° ÑÐ°ÐºÐ¶Ðµ ÑÐ¼ÐµÐ½ÑÑÐµÐ½Ð½Ð¾Ðµ Ð² 2 Ð¸ ÑÐµÑÑÑÐµ ÑÐ°Ð·Ð° Ð¿Ð¾ Ð¿ÑÐ¾Ð´Ð¾Ð»ÑÐ½Ð¾Ð¼Ñ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ. Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ Ð²ÑÑÑÐ½ÐµÐ½Ð¾, ÑÑÐ¾ Ð² ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÐ¼Ð¾Ð¹ ÐºÐ¾Ð½ÑÐ¸Ð³ÑÑÐ°ÑÐ¸Ð¸, Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ ÑÐ»Ð¾Ñ ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ Ð½Ðµ Ð¿Ð¾ÑÐ¾Ð¶Ðµ Ð½Ð° ÑÐ¼ÐµÑÐµÐ½Ð¸Ðµ ÑÐ²Ð¾Ð±Ð¾Ð´Ð½ÑÑ Ð¿Ð¾ÑÐ¾ÐºÐ¾Ð²: ÑÐºÐ¾ÑÐ¾ÑÑÑ Ð½Ð° Ð²Ð½ÐµÑÐ½ÐµÐ¹ Ð³ÑÐ°Ð½Ð¸ÑÐµ ÑÐ»Ð¾Ñ ÑÑÑÐ´Ð½Ð¾ Ð¾Ð¿ÑÐµÐ´ÐµÐ»Ð¸ÑÑ, ÑÐ°Ðº ÐºÐ°Ðº Ð² ÐºÐ°Ð½Ð°Ð»Ðµ Ð¾Ð½Ð° ÑÐ°ÑÑÐµÑ Ð´Ð¾ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð½Ð° Ð¾ÑÐ¸ ÑÐµÑÐµÐ½Ð¸Ñ, Ð½Ð¸Ð¶Ð½ÑÑ Ð³ÑÐ°Ð½Ð¸ÑÐ° ÑÐ»Ð¾Ñ ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ ÑÐ¾Ð¶Ðµ Ð½Ðµ Ð¿Ð¾Ð´Ð´Ð°ÐµÑÑÑ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ, Ð¿Ð¾ÑÐ¾Ð¼Ñ ÑÑÐ¾ ÑÐ½Ð¸Ð·Ñ ÑÐ»Ð¾Ð¹ Ð¾Ð³ÑÐ°Ð½Ð¸ÑÐµÐ½ Ð·Ð¾Ð½Ð°Ð¼Ð¸ ÑÐµÑÐ¸ÑÐºÑÐ»ÑÑÐ¸Ð¸ ÑÐµÑÐµÐ½Ð¸Ñ Ð¼ÐµÐ¶Ð´Ñ ÑÐµÐ±ÑÐ°Ð¼Ð¸. Ð¢Ð°ÐºÐ¶Ðµ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð¾, ÑÑÐ¾ Ð²Ð¾ Ð²ÑÐµÐ¹ Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ Ð² ÑÐ»ÐµÐ´Ðµ Ð·Ð° ÑÐµÐ±ÑÐ¾Ð¼ ÐºÐ¸Ð½ÐµÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÐ½ÐµÑÐ³Ð¸Ñ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾ÑÑÐ¸ Ð¼ÐµÐ½ÑÑÐµ, ÑÐµÐ¼ Ð·Ð° Ð¿ÑÐµÐ´ÐµÐ»Ð°Ð¼Ð¸ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ ÑÐ»Ð¾Ñ.
description: In this paper, a computational study of the flow in a flat channel in the wake behind a rib is carried out. Tasks were solved during the study: Investigation of the influence of mesh size on the results; Comparison of the results obtained using two different turbulence models and their comparison with experimental data; Analysis of the effect of the longitudinal edge size on the flow and determination of the best geometry. Numerical simulation was carried out in the Ansys FLUENT package. Calculations were performed at the Reynolds number equal to Re=37200 using the k-Ï Standard and Spalart-Allmaras models. As part of the parametric study, 5 different geometries were considered - a square rib, elongated by 2 and 4 times, and also reduced by 2 and four times in the longitudinal direction. As a result, it was found that in the configuration under consideration, the behavior of the mixing layer is not similar to the mixing of free flows: the speed at the outer boundary of the layer is difficult to determine, since in the channel it grows to the speed on the flow axis, the lower boundary of the mixing layer is also not determinable, because From below, the layer is limited by flow recirculation zones between the ribs. It was also found that throughout the entire mixing region in the wake behind the rib, the kinetic energy of turbulence is less than outside this layer.