Results of numerical study of laminar free convection and heat transfer in a vertical plane - parallel channel with two thin adiabatic ribs on its walls are presented. The channel had the open inlet and outlet, and its surfaces were maintained at the same temperature. The channel height was unchanged with elongation parameter A = L/w = 10, and the ribs were located in the middle of the channel towards each other. Rib height l/w = 0÷0.4 and Rayleigh number Ra = 10~2 ÷ 10~5 were varied in calculations. The effect of these parameters on the flow structure, temperature field, local and integral heat transfer, and gas flow caused by gravitational forces were analyzed in detail. Numerical analysis was based on the solution of the full Navier - Stokes and energy equations in two-dimensional statement and Boussinesq approximation. To determine the dynamic and thermal parameters at the inlet and outlet, the calculation was carried out with two large volumes attached to the inlet and outlet. The features of the flow and heat transfer at separated flow around the channel ribs were studied in detail in this work.
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机译：提出了垂直平面 - 平行通道中层状对流和传热的数值研究结果。通道具有开口入口和出口，其表面保持在相同温度。沟道高度与伸长率A = L / W = 10不变，并且肋位于通道的中间朝向彼此。 Rib Height L / W = 0÷0.4和Rayleigh Number Ra = 10〜2¼10〜5在计算中变化。详细地分析了这些参数对流动结构，温度场，局部和整体传热的影响，并进行了由重力引起的气流。数值分析基于全Navier - Stokes和二维语句中的能量方程的解决方案和BoussinesQ近似。为了确定入口和出口处的动态和热参数，通过连接到入口和出口的两个大容量进行计算。在这项工作中详细研究了通道肋周围的分离流动的流动和热传递的特征。
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